TWI847209B - Optical imaging lens assembly, imaging apparatus and electronic device - Google Patents

Abstract

According to the present disclosure, an optical imaging lens assembly includes at least one optical lens element. The optical lens element includes an anti-reflective coating having a high-low refractive coating and a gradient refractive coating. The high-low refractive coating is arranged between the optical lens element and the gradient refractive coating. The high-low refractive coating includes at least one high refractive coating layer and at least one low refractive coating layer. The high refractive coating layer and the low refractive coating layer are stacked in alternations. The gradient refractive coating includes a plurality of holes. The holes away from the optical lens element are relatively larger than the holes adjacent to the optical lens element. By coating the anti-reflective coating which is uniform and dense on a surface of the optical imaging lens assembly, a significant anti-oxidation property is provided for the optical lens element. Thus, it is favorable for obtaining an anti-reflective effect in a wide wavelength region to satisfy the optical imaging lens assembly with high imaging quality.

Description

Imaging optical lens, imaging device and electronic device

The present disclosure relates to an imaging optical lens and an imaging device, and in particular to an imaging optical lens and an imaging device which are applied to electronic devices and have good anti-reflection effects.

Traditional anti-reflection film (ARC) technology is not effective in reducing the reflectivity in the wide wavelength range. The strong light in the long wavelength region causes the image quality to deteriorate. When the incident angle increases, the internal light path increases, resulting in the optical path difference between the film layers of the reflected light not being enough to achieve destructive interference conditions. Therefore, it cannot solve the serious reflection problem caused when the light is incident on the lens surface at a large angle. In terms of the characteristics of glass materials, the smaller the dispersion, the clearer the image can be. Although for large-mouth It can significantly help with the dispersion correction of radial photography lenses, but its anti-oxidation ability to water and oxygen in the air is relatively poor; the traditional anti-reflection film technology mainly produces solidification or deposition on the contact surface through the coating material. The uniformity and coverage of the coating are directly related to the particle size of the material and the flatness of the contact surface. Therefore, the traditional anti-reflection film technology is often limited by optical lenses with drastic surface shape changes, resulting in the inability to meet the requirements of high-end optical systems for reducing the reflectivity of lenses. Therefore, in high-end optical systems with greater freedom of surface shape changes, the development of coating technology with excellent substrate protection and good anti-reflection effect has become an important goal.

The imaging optical lens, imaging device and electronic device provided by the present disclosure have a uniform and dense anti-reflection film deposited on the surface of the imaging optical lens, so that the optical lens with poor water resistance and acid resistance has significant antioxidant ability, which helps to achieve an anti-reflection effect in a wide wavelength range to meet the needs of an imaging optical lens with high imaging quality.

According to an embodiment of an aspect of the present disclosure, an imaging optical lens is provided, which includes at least one optical lens. The optical lens is made of glass, and includes an anti-reflection film, which is located on at least one surface of the optical lens. The anti-reflection film includes a high-low refractive index film and a gradient refractive index film, and the high-low refractive index film is arranged between the optical lens and the gradient refractive index film. The high-low refractive index film includes at least one high refractive index film layer and at least one low refractive index film layer, and the high refractive index film layer and the low refractive index film layer are alternately stacked, and the low refractive index film layer contacts the optical lens, and the main material of the low refractive index film layer is aluminum oxide. The gradient refractive index film includes a plurality of holes, the holes far from the optical lens are relatively larger than the holes close to the optical lens, and the main material of the gradient refractive index film is metal oxide. The total thickness of the anti-reflection film located at the center of the optical lens is Tc, and the total thickness of the anti-reflection film located at the periphery of the optical lens is Tp, which meets the following conditions: 0% < |Tc-Tp|/Tc ≤ 15.0%.

According to the imaging optical lens of the aforementioned embodiment, the total film thickness of the anti-reflection film is tTK, which can meet the following condition: 200 nm ≤ tTK ≤ 800 nm.

According to the imaging optical lens of the aforementioned embodiment, the refractive index of the high refractive index film layer is NH, which can meet the following condition: 2.00 ≤ NH.

According to the imaging optical lens of the aforementioned embodiment, the refractive index of the low refractive index film layer is NL, which can meet the following condition: NL ≤ 1.80.

In the imaging optical lens according to the aforementioned embodiment, the total film thickness of the high refractive index film layer is TNH, which can meet the following condition: 1 nm ≤ TNH ≤ 60 nm.

According to the imaging optical lens of the aforementioned embodiment, the total film thickness of the low refractive index film layer is TNL, which can meet the following conditions: 1 nm ≤ TNL ≤ 300 nm.

According to the imaging optical lens of the aforementioned embodiment, the thickness of the low refractive index film layer contacting the optical lens is TL1, which can meet the following condition: 10 nm ≤ TL1 ≤ 100 nm.

According to the imaging optical lens of the aforementioned embodiment, the film thickness of the gradient refractive index film is TNG, and the total film thickness of the anti-reflection film is tTK, which can meet the following condition: 0.45 ≤ TNG/tTK ≤ 0.85.

In the imaging optical lens according to the aforementioned embodiment, the material of the gradient refractive index film may be aluminum oxide.

According to the imaging optical lens of the aforementioned embodiment, the total thickness of the anti-reflection film located at the center of the optical lens is Tc, and the total thickness of the anti-reflection film located at the periphery of the optical lens is Tp, which can meet the following condition: 0% < |Tc-Tp|/Tc ≤ 10.0%.

According to the imaging optical lens of the aforementioned embodiment, the horizontal displacement of the surface of the optical lens at the maximum effective diameter is SAG, and the total film thickness of the anti-reflection film is tTK, which can meet the following condition: 0 ≤ |SAG|/tTK ≤ 10.0.

According to the imaging optical lens of the aforementioned embodiment, the average reflectivity of the optical lens at a wavelength of 400 nm to 1000 nm is R40100, which can meet the following conditions: 0% < R40100 ≤ 1.00%.

According to the imaging optical lens of the aforementioned embodiment, the average reflectivity of the optical lens at a wavelength of 400 nm to 700 nm is R4070, which can meet the following conditions: 0% < R4070 ≤ 1.00%.

According to the imaging optical lens of the aforementioned embodiment, the average reflectivity of the optical lens at a wavelength of 700 nm to 1000 nm is R70100, which can meet the following conditions: 0% < R70100 ≤ 1.00%.

According to the imaging optical lens of the aforementioned embodiment, the dispersion coefficient of the optical lens is Vs, which can meet the following condition: 35.0 ≤ Vs ≤ 85.0.

According to the imaging optical lens of the aforementioned embodiment, the refractive index of the optical lens is Ns, which can meet the following condition: Ns ≤ 1.85.

According to the imaging optical lens of the aforementioned embodiment, the acid resistance of the optical lens is Da, and the dispersion coefficient of the optical lens is Vs, which can meet the following conditions: 0.6 ≤ Vs×Da/10 ≤ 13.0.

According to the imaging optical lens of the aforementioned embodiment, the acid resistance of the optical lens is Da, and the refractive index of the optical lens is Ns, which can meet the following conditions: 0.1 ≤ Ns×Da ≤ 4.5.

According to the imaging optical lens of the aforementioned embodiment, the water resistance of the optical lens is Dw, and the dispersion coefficient of the optical lens is Vs, which can meet the following condition: 0 < Vs×Dw ≤ 10.0.

According to the imaging optical lens of the aforementioned embodiment, the water resistance of the optical lens is Dw, and the refractive index of the optical lens is Ns, which can meet the following condition: 0 < Ns×Dw×100 ≤ 50.

The imaging optical lens according to the above-mentioned embodiment may further include at least one optical element. The material of the optical element may be glass. The optical element may include an anti-reflection film. The anti-reflection film of the optical element may be located on at least one surface of the optical element. The optical element may be a prism.

According to another aspect of the present disclosure, an imaging device is provided, which includes an imaging optical lens as described above and an electronic photosensitive element, and the electronic photosensitive element is disposed on an imaging surface of the imaging optical lens.

According to another aspect of the present disclosure, an electronic device is provided, which is a vehicle device, and the electronic device includes the imaging device as described in the above aspect.

According to another embodiment of an aspect of the present disclosure, an imaging optical lens is provided, which includes at least two optical lenses and at least one optical element. At least one of the at least two optical lenses includes a long-wavelength absorbing material, and the optical lens including the long-wavelength absorbing material is made of a plastic material, and the long-wavelength absorbing material is uniformly mixed in the plastic material. At least one of the at least two optical lenses comprises a long-wavelength filter coating, the long-wavelength filter coating is located on the object side surface or the image side surface of the optical lens, the long-wavelength filter coating comprises a plurality of high-refractive index film layers and a plurality of low-refractive index film layers, and the high-refractive index film layers of the long-wavelength filter coating and the low-refractive index film layers of the long-wavelength filter coating are alternately stacked. The material of the optical element is glass, the optical element comprises an anti-reflection film, the anti-reflection film of the optical element is located on at least one surface of the optical element, and the optical element is a flat glass. The anti-reflection film of the optical element comprises a high-low refractive index film and a gradient refractive index film, and the high-low refractive index film is configured between the optical element and the gradient refractive index film. The high-low refractive index film includes at least one high refractive index film layer and at least one low refractive index film layer, the high refractive index film layer of the high-low refractive index film and the low refractive index film layer of the high-low refractive index film are alternately stacked, the low refractive index film layer of the high-low refractive index film contacts the optical element, and the main material of the low refractive index film layer of the high-low refractive index film is aluminum oxide. The gradient refractive index film includes a plurality of holes, the holes far from the optical element are relatively larger than the holes close to the optical element, and the main material of the gradient refractive index film is metal oxide.

When |Tc-Tp|/Tc meets the above conditions, the uniformity of the total film thickness of the anti-reflection film can be maintained, which not only effectively solves the defect of reflected light caused by the inability to uniformly coat the film when the peripheral surface deformation changes violently, but also helps to improve the anti-reflection effect of the surface with large angle incidence of light.

An embodiment of an aspect of the present disclosure provides an imaging optical lens, which includes at least one optical lens. The optical lens is made of glass, and the optical lens includes an anti-reflection film, which is located on at least one surface of the optical lens. The anti-reflection film includes a high-low refractive index film and a gradient refractive index film, and the high-low refractive index film is configured between the optical lens and the gradient refractive index film. The high-low refractive index film includes at least one high refractive index film layer and at least one low refractive index film layer, the high refractive index film layer and the low refractive index film layer are alternately stacked, the low refractive index film layer contacts the optical lens, and the main material of the low refractive index film layer is aluminum oxide. The gradient refractive index film includes a plurality of holes, the holes far from the optical lens are relatively larger than the holes close to the optical lens, and the main material of the gradient refractive index film is metal oxide. The total thickness of the anti-reflection film located at the center of the optical lens is Tc, and the total thickness of the anti-reflection film located at the periphery of the optical lens is Tp, which meets the following conditions: 0% < |Tc-Tp|/Tc ≤ 15.0%.

The disclosure uses multi-layer coating technology on the surface of an optical lens of an imaging optical lens. By alternately stacking a plurality of high-refractive index film layers and low-refractive index film layers of high and low refractive index films, light is destructively interfered on the film surface to achieve the purpose of reducing reflected light. The pore structure with gradually varying sizes in the gradient refractive index film and its gradient-varying refractive index effectively provide an anti-reflection effect in a wide wavelength range and solve the serious reflection problem of light incident at a large angle. The disclosure is to coat a uniform and dense anti-reflection film on the surface of an imaging optical lens, so that an optical lens with insufficient water resistance and acid resistance has a significant antioxidant ability, which helps to achieve an anti-reflection effect in a wide wavelength range to meet the needs of an imaging optical lens with high imaging quality.

The total thickness of the anti-reflection film is tTK, which can meet the following conditions: 200 nm ≤ tTK ≤ 800 nm. By controlling the total thickness of the anti-reflection film, it helps to maintain the integrity of the entire coating and achieve the best anti-reflection effect. Furthermore, the following conditions can be met: 200 nm ≤ tTK ≤ 700 nm; 200 nm ≤ tTK ≤ 600 nm; 200 nm ≤ tTK ≤ 500 nm; or 300 nm ≤ tTK ≤ 400 nm.

The refractive index of the high refractive index film layer is NH, which can meet the following conditions: 2.00 ≤ NH. By controlling the refractive index of the high refractive index film layer, a larger refractive index difference is provided to enhance the anti-reflection effect. Furthermore, the following conditions can be met: 2.05 ≤ NH; 2.10 ≤ NH; 2.20 ≤ NH; or 2.30 ≤ NH ≤ 2.40.

The refractive index of the low refractive index film layer is NL, which can meet the following conditions: NL ≤ 1.80. By controlling the refractive index of the low refractive index film layer, the anti-reflection effect is effectively improved. Furthermore, the following conditions can be met: 1.40 ≤ NL ≤ 1.80; 1.40 ≤ NL ≤ 1.70; 1.45 ≤ NL ≤ 1.70; or 1.45 ≤ NL ≤ 1.68.

The total thickness of the high refractive index film is TNH, which can meet the following conditions: 1 nm ≤ TNH ≤ 60 nm. By controlling the high refractive index film to a specific thickness, the reflected light can easily generate destructive interference on the surface of the spaced film layer, which helps to enhance the anti-reflection effect. Furthermore, the following conditions can be met: 1 nm ≤ TNH ≤ 50 nm; 1 nm ≤ TNH ≤ 40 nm; 1 nm ≤ TNH ≤ 36 nm; or 1 nm ≤ TNH ≤ 30 nm.

The total thickness of the low refractive index film is TNL, which can meet the following conditions: 1 nm ≤ TNL ≤ 300 nm. By controlling the low refractive index film to a specific thickness, the reflected light can easily produce destructive interference on the surface of the spaced film layer, which helps to improve the anti-reflection effect. In addition, the following conditions can be met: 20 nm ≤ TNL ≤ 240 nm; 30 nm ≤ TNL ≤ 200 nm; 40 nm ≤ TNL ≤ 170 nm; or 50 nm ≤ TNL ≤ 140 nm.

The film thickness of the low refractive index film contacting the optical lens is TL1, which can meet the following conditions: 10 nm ≤ TL1 ≤ 100 nm. By controlling the film thickness of the contacting optical lens, the glass surface is protected and the coating time and cost are effectively reduced. Furthermore, the following conditions can be met: 1 nm ≤ TL1 ≤ 150 nm; 10 nm ≤ TL1 ≤ 120 nm; 15 nm ≤ TL1 ≤ 100 nm; 20 nm ≤ TL1 ≤ 85 nm; or 25 nm ≤ TL1 ≤ 70 nm. In addition, the film layers of the high and low refractive index films are the first film layer, the second film layer, the third film layer, the fourth film layer, and so on from the optical lens to the outside, so TL1 can also be called the film thickness of the first film layer.

The film thickness of the gradient refractive index film is TNG, and the total film thickness of the anti-reflection film is tTK, which can meet the following conditions: 0.45 ≤ TNG/tTK ≤ 0.85. By controlling the film thickness of the gradient refractive index film and maintaining the optimal hole structure, the optimal gradient refractive index design is effectively achieved to enhance the anti-reflection effect of light incident at a large angle and avoid the reduction of the anti-reflection effect due to insufficient film thickness. Furthermore, the following conditions can be met: 0.50 ≤ TNG/tTK ≤ 0.80; 0.50 ≤ TNG/tTK ≤ 0.75; 0.60 ≤ TNG/tTK ≤ 0.75; or 0.60 ≤ TNG/tTK ≤ 0.70.

The material of the gradient refractive index film can be aluminum oxide. By selecting a material of the gradient refractive index film suitable for the pore-making process, the surface pore distribution and the pore gap are effectively improved, presenting the best sponge pore structure and pore density.

The total thickness of the anti-reflection film at the center of the optical lens is Tc, and the total thickness of the anti-reflection film at the periphery of the optical lens is Tp, which meets the following conditions: 0% < |Tc-Tp|/Tc ≤ 15.0%. By maintaining the uniformity of the total film thickness of the anti-reflection film, it not only effectively solves the defect of reflected light caused by the inability to uniformly coat the film when the peripheral surface deformation changes violently, but also helps to improve the anti-reflection effect of the surface with large angle incidence of light. Furthermore, the following conditions can be met: 0% < |Tc-Tp|/Tc ≤ 10.0%; 0% < |Tc-Tp|/Tc ≤ 5.0%; 0% < |Tc-Tp|/Tc ≤ 1.0%; or 0% < |Tc-Tp|/Tc ≤ 0.4%.

The horizontal displacement of the surface of the optical lens at the maximum effective diameter is SAG, and the total film thickness of the anti-reflection film is tTK, which can meet the following conditions: 0 ≤ |SAG|/tTK ≤ 10.0. By controlling the coating and surface shape conditions, when using atomic layer deposition technology for coating, it will not be limited by the parameters of the optical lens with large surface changes. In addition, the following conditions can be met: 0 ≤ |SAG|/tTK ≤ 8.0; 0 ≤ |SAG|/tTK ≤ 6.0; 0.1 ≤ |SAG|/tTK ≤ 6.0; or 0.1 ≤ |SAG|/tTK ≤ 5.0.

The average reflectivity of the optical lens at a wavelength of 400 nm to 1000 nm is R40100, which can meet the following conditions: 0% ＜ R40100 ≤ 1.00%. In this way, the reflection effect of light in the wide wavelength range on the surface can be effectively controlled, which helps to increase the transmittance in the wide wavelength range. Furthermore, the following conditions can be met: 0% ＜ R40100 ≤ 0.80%; 0% ＜ R40100 ≤ 0.50%; 0% ＜ R40100 ≤ 0.25%; or 0% ＜ R40100 ≤ 0.15%.

The average reflectivity of the optical lens at a wavelength of 400 nm to 700 nm is R4070, which can meet the following conditions: 0% ＜ R4070 ≤ 1.00%. In this way, the reflection effect of light in the visible light band on the surface can be effectively controlled, which helps to increase the transmittance of the blue, green and red visible light regions. Furthermore, the following conditions can be met: 0% ＜ R4070 ≤ 0.50%; 0% ＜ R4070 ≤ 0.25%; 0% ＜ R4070 ≤ 0.10%; or 0% ＜ R4070 ≤ 0.05%.

The average reflectivity of the optical lens at a wavelength of 700 nm to 1000 nm is R70100, which can meet the following conditions: 0% ＜ R70100 ≤ 1.00%. In this way, the reflection effect of infrared light on the surface can be effectively controlled, which helps to increase the transmittance in the long wavelength range. Furthermore, the following conditions can be met: 0% ＜ R70100 ≤ 0.80%; 0% ＜ R70100 ≤ 0.60%; 0% ＜ R70100 ≤ 0.45%; or 0% ＜ R70100 ≤ 0.25%.

The dispersion coefficient of an optical lens is Vs, which can meet the following conditions: 35.0 ≤ Vs ≤ 85.0. By selecting the appropriate glass material, it helps to significantly improve the anti-oxidation ability of the optical lens and provide the best protection. In addition, the following conditions can be met: 35.0 ≤ Vs ≤ 71.0; 35.0 ≤ Vs ≤ 60.0; 50.0 ≤ Vs ≤ 71.0; or 35.0 ≤ Vs ≤ 50.0.

The refractive index of the optical lens is Ns, which can meet the following conditions: Ns ≤ 1.85. By controlling the refractive index of the optical lens material, it helps the surface coating to achieve the best anti-reflection effect. Furthermore, the following conditions can be met: 1.45 ≤ Ns ≤ 1.85; 1.50 ≤ Ns ≤ 1.85; 1.60 ≤ Ns ≤ 1.85; or 1.70 ≤ Ns ≤ 1.85.

The acid resistance of the optical lens is Da, and the dispersion coefficient of the optical lens is Vs, which can meet the following conditions: 0.6 ≤ Vs×Da/10 ≤ 13.0. By configuring the dispersion coefficient of the optical lens, it is helpful to exert the anti-oxidation protection effect of the film layer. In addition, the following conditions can be met: 0.6 ≤ Vs×Da/10 ≤ 10.0; 0.85 ≤ Vs×Da/10 ≤ 8.5; 3.0 ≤ Vs×Da/10 ≤ 13.0; or 0.9 ≤ Vs×Da/10 ≤ 3.5.

The acid resistance of the optical lens is Da, and the refractive index of the optical lens is Ns, which can meet the following conditions: 0.1 ≤ Ns×Da ≤ 4.5. By configuring the refractive index of the optical lens, it helps to exert the anti-oxidation protection effect of the film. In addition, the following conditions can be met: 0.2 ≤ Ns×Da ≤ 4.1; 0.3 ≤ Ns×Da ≤ 4.0; 0.3 ≤ Ns×Da ≤ 2.5; or 0.3 ≤ Ns×Da ≤ 1.2.

The water resistance of the optical lens is Dw, and the dispersion coefficient of the optical lens is Vs, which can meet the following conditions: 0 ＜ Vs×Dw ≤ 10.0. By configuring the dispersion coefficient of the optical lens, it is helpful to exert the anti-oxidation protection effect of the film layer. In addition, the following conditions can be met: 0 ＜ Vs×Dw ≤ 7.5; 0 ＜ Vs×Dw ≤ 6.0; 0 ＜ Vs×Dw ≤ 5.0; or 0 ＜ Vs×Dw ≤ 3.0.

The water resistance of the optical lens is Dw, and the refractive index of the optical lens is Ns, which can meet the following conditions: 0 ＜ Ns×Dw×100 ≤ 50. By configuring the refractive index of the optical lens, it is helpful to exert the anti-oxidation protection effect of the film. In addition, the following conditions can be met: 0 ＜ Ns×Dw×100 ≤ 40; 0 ＜ Ns×Dw×100 ≤ 30; 0 ＜ Ns×Dw×100 ≤ 25; or 0 ＜ Ns×Dw×100 ≤ 17.

The imaging optical lens may further include at least one optical element, the material of the optical element may be glass, the optical element may include an anti-reflection film, the anti-reflection film of the optical element may be located on at least one surface of the optical element, and the optical element may be a prism. By configuring the anti-reflection film, the loss of light penetrating the prism is effectively reduced.

Another embodiment of an aspect of the present disclosure provides an imaging optical lens, which includes at least two optical lenses and at least one optical element. At least one of the at least two optical lenses includes a long-wavelength absorbing material, and the optical lens including the long-wavelength absorbing material is made of a plastic material, and the long-wavelength absorbing material is uniformly mixed in the plastic material. At least one of the at least two optical lenses comprises a long-wavelength filter coating, the long-wavelength filter coating is located on the object side surface or the image side surface of the optical lens, the long-wavelength filter coating comprises a plurality of high-refractive index film layers and a plurality of low-refractive index film layers, and the high-refractive index film layers of the long-wavelength filter coating and the low-refractive index film layers of the long-wavelength filter coating are alternately stacked. The material of the optical element is glass, the optical element comprises an anti-reflection film, the anti-reflection film of the optical element is located on at least one surface of the optical element, and the optical element is a flat glass. The anti-reflection film of the optical element comprises a high-low refractive index film and a gradient refractive index film, and the high-low refractive index film is configured between the optical element and the gradient refractive index film. The high-low refractive index film includes at least one high refractive index film layer and at least one low refractive index film layer, the high refractive index film layer of the high-low refractive index film and the low refractive index film layer of the high-low refractive index film are alternately stacked, the low refractive index film layer of the high-low refractive index film contacts the optical element, and the main material of the low refractive index film layer of the high-low refractive index film is aluminum oxide. The gradient refractive index film includes a plurality of holes, the holes far from the optical element are relatively larger than the holes close to the optical element, and the main material of the gradient refractive index film is metal oxide.

Thus, the imaging optical lens provided by the present disclosure has the function of reducing blue glass elements and infrared filter elements, and effectively avoids the petal-shaped stray light caused by reflection between the microlens surface and the protective glass surface.

Another aspect of the present disclosure provides an imaging device, which includes an imaging optical lens as described above and an electronic photosensitive element, and the electronic photosensitive element is disposed on an imaging surface of the imaging optical lens.

Another aspect of the present disclosure provides an electronic device, which is a vehicle device or a mobile device, and the electronic device includes the imaging device as described in the above aspect.

The full viewing angle of the imaging optical lens is FOV, which can meet the following conditions: 15 degrees ≤ FOV ≤ 180 degrees; 30 degrees ≤ FOV ≤ 150 degrees; or 35 degrees ≤ FOV ≤ 120 degrees.

In an imaging optical lens, the distance from the object-side surface of the first optical lens to the image-side surface of the last optical lens is TD, which can meet the following conditions: 5 mm ≤ TD ≤ 30 mm; 5 mm ≤ TD ≤ 25 mm; or 10 mm ≤ TD ≤ 20 mm.

The horizontal displacement of the surface of the optical lens at the maximum effective diameter is SAG, which can meet the following conditions: 0 mm ≤ |SAG| ≤ 8.00 mm; 0 mm ≤ |SAG| ≤ 5.60 mm; 0 mm ≤ |SAG| ≤ 3.60 mm; 0.02 mm ≤ |SAG| ≤ 3.00 mm; or 0.03 mm ≤ |SAG| ≤ 2.00 mm.

The maximum value of the effective diameter among all optical lens surfaces is SDmax, which can meet the following conditions: 1 mm ≤ SDmax ≤ 20 mm; 1 mm ≤ SDmax ≤ 15 mm; or 3 mm ≤ SDmax ≤ 13 mm.

The thickness of the optical lens on the optical axis is CT, which can meet the following conditions: 0.5 mm ≤ CT ≤ 6.0 mm; 0.5 mm ≤ CT ≤ 4.0 mm; or 0.7 mm ≤ CT ≤ 2.0 mm.

The water resistance rating of an optical lens is RW, which meets the following conditions: 1 ≤ RW ≤ 6; 1 ≤ RW ≤ 5; or 1 ≤ RW ≤ 3.

The acid resistance grade of optical lenses is RA, which can meet the following conditions: 1 ≤ RA ≤ 6; 2 ≤ RA ≤ 6; or 3 ≤ RA ≤ 6.

The layers of the high and low refractive index films are the first layer, the second layer, the third layer, the fourth layer, and so on from the optical lens to the outside. The thickness of the second layer is TL2, which can meet the following conditions: 1 nm ≤ TL2 ≤ 30 nm; 1 nm ≤ TL2 ≤ 25 nm; 1 nm ≤ TL2 ≤ 20 nm; 1 nm ≤ TL2 ≤ 18 nm; or 1 nm ≤ TL2 ≤ 15 nm.

The thickness of the third film layer is TL3, which may satisfy the following conditions: 1 nm ≤ TL3 ≤ 150 nm; 10 nm ≤ TL3 ≤ 120 nm; 15 nm ≤ TL3 ≤ 100 nm; 20 nm ≤ TL3 ≤ 85 nm; or 25 nm ≤ TL3 ≤ 70 nm.

The thickness of the fourth film layer is TL4, which may satisfy the following conditions: 1 nm ≤ TL4 ≤ 30 nm; 1 nm ≤ TL4 ≤ 25 nm; 1 nm ≤ TL4 ≤ 20 nm; 1 nm ≤ TL4 ≤ 18 nm; or 1 nm ≤ TL4 ≤ 15 nm.

The film thickness of the gradient refractive index film is TNG, which can meet the following conditions: 90 nm ≤ TNG ≤ 680 nm; 100 nm ≤ TNG ≤ 560 nm; 100 nm ≤ TNG ≤ 450 nm; 120 nm ≤ TNG ≤ 375 nm; or 180 nm ≤ TNG ≤ 280 nm.

The average reflectivity of the optical lens at a wavelength of 400 nm to 600 nm is R4060, which may meet the following conditions: 0% < R4060 ≤ 1.00%; 0% < R4060 ≤ 0.50%; 0% < R4060 ≤ 0.25%; 0% < R4060 ≤ 0.10%; or 0% < R4060 ≤ 0.05%.

The average reflectivity of the optical lens at a wavelength of 500 nm to 600 nm is R5060, which may satisfy the following conditions: 0% < R5060 ≤ 1.00%; 0% < R5060 ≤ 0.50%; 0% < R5060 ≤ 0.25%; 0% < R5060 ≤ 0.10%; or 0% < R5060 ≤ 0.05%.

The average reflectivity of the optical lens at a wavelength of 500 nm to 700 nm is R5070, which may satisfy the following conditions: 0% < R5070 ≤ 1.00%; 0% < R5070 ≤ 0.50%; 0% < R5070 ≤ 0.25%; 0% < R5070 ≤ 0.10%; or 0% < R5070 ≤ 0.05%.

The average reflectivity of the optical lens at a wavelength of 800 nm to 1000 nm is R80100, which may satisfy the following conditions: 0% < R80100 ≤ 1.00%; 0% < R80100 ≤ 0.85%; 0% < R80100 ≤ 0.70%; 0% < R80100 ≤ 0.50%; or 0% < R80100 ≤ 0.35%.

The average reflectivity of the optical lens at a wavelength of 900 nm to 1000 nm is R90100, which may satisfy the following conditions: 0% < R90100 ≤ 1.00%; 0% < R90100 ≤ 0.90%; 0% < R90100 ≤ 0.75%; 0% < R90100 ≤ 0.60%; or 0% < R90100 ≤ 0.50%.

The reflectivity of the present disclosure is measured using a single optical lens, and the reflectivity data at incident angles of 0 degrees and 30 degrees are used as comparison benchmarks.

The main material of the present disclosure may mean that the material accounts for at least 50% of the total weight.

An imaging optical lens disclosed herein includes at least two optical lenses and at least one optical element. The optical element may be located on the object side or the image side of the at least two optical lenses, or may be located between the at least two optical lenses.

The glass material disclosed herein may be high-alkali metal oxide glass, high-silicon oxide glass, or special glass containing fluoride and phosphate, which can provide the best anti-oxidation effect; a glass material with good water resistance and acid resistance can also be selected as a coating substrate to provide better anti-oxidation ability.

The acid resistance value test method of the optical lens disclosed in the present disclosure is based on the test method of GB/T 171292. A certain specific gravity of powdered glass with a particle size of 425 μm to 600 μm is added to a nitric acid aqueous solution with a volume molar concentration of 0.01 mol/L. The acid resistance value of the optical lens is determined according to the percentage (%) of mass reduction, and is divided into 6 grades.

The test method for the water resistance value of optical lenses disclosed in this disclosure is based on the test method of GB/T 171292. Powdered glass with a particle size of 425 μm to 600 μm is added with an equivalent specific gravity to 80 ml of pure water (pH 6.5 to 7.5) and boiled for 60 minutes. The water resistance value of the optical lens is determined according to the percentage (%) of mass reduction, and is divided into 6 grades.

The anti-reflection film disclosed herein is a multi-layer film deposited on a glass surface using physical vapor deposition (PVD), such as evaporation deposition or sputtering deposition, or chemical vapor deposition (CVD), such as ultra-high vacuum chemical vapor deposition, microwave plasma-assisted chemical vapor deposition, plasma-enhanced chemical vapor deposition or atomic layer deposition (ALD).

The anti-reflection film disclosed in the present invention can be coated on both sides, or it can be produced on only one appropriate surface. By applying the technology disclosed in the present invention to the surface of the optical lens with severe surface deformation, the atomic layer deposition coating has an optimized value, a balance is achieved between cost and quality, and it is produced on the surface of the most appropriate optical lens material, so that the anti-reflection effect can be achieved.

The membrane layer pore formation process disclosed in the present invention can effectively improve the surface pore distribution, increase the surface pore gap, present a sponge-like pore structure, or change the pore density. The pore formation effect can also change with the increase of depth, such as the outer side in contact with the air has a larger pore structure, while the deeper inner side has a relatively smaller pore structure. The pores are composed of spaces between irregular nanofiber structures (nanofiber), which have It has the effect of allowing air to remain or connect between the pores. The outer side and the inner side of the anti-reflection film layer refer to the side far from the optical lens in the cross-sectional view, and the inner side is the side close to the optical lens. The holes (gaps, pores) distributed on the outer side are relatively larger than the holes on the inner side. It can also be explained that the distribution density of the irregular branched structure on the outer side is sparser under the same plane, and the distribution density of the irregular branched structure on the inner side is denser under the same plane. The pore-making process can use plasma etching, chemical reaction etching, time-controlled crystal grain size technology or high-temperature solution treatment, such as immersion in alcohol or water at a temperature above 50 degrees.

The main material of the gradient refractive index film disclosed herein is metal oxide, which may be aluminum oxide, or may be aluminum nitride (AlN), aluminum hydroxide (Al(OH) ₃ ) or an aluminum-containing mixture.

The high and low refractive index films disclosed herein can also have an additional film layer between the high refractive index film layer and the low refractive index film layer. Through the configuration design of the coating, the refractive index between the film layers can have a gradient change, and the difference between the high and low refractive indices can be satisfied and destructive interference can be used to reduce the purpose of reflected light, effectively improving the anti-reflection effect in a wide wavelength range.

The gradient variation of the present disclosure may be a polynomial function (including linear function and curvilinear function) or a Gaussian function of the relationship between the refractive index and the position, or a combination thereof.

The high refractive index film layer or low refractive index film layer disclosed herein can be a film layer contacting an optical lens or an optical element, and its main material is aluminum oxide, or can be aluminum nitride, aluminum hydroxide or an aluminum-containing mixture; or can be zinc oxide or magnesium oxide; or can be a mixed material of at least one of the above aluminum oxide, zinc oxide, and magnesium oxide and other metal oxides. It has the characteristics of a dense structure, which can enhance the adhesion between the material and the optical lens to prevent the coating from falling off, thereby achieving the surface protection effect of the optical lens in the coating process and effectively enhancing the environmental weather resistance of the optical lens.

The refractive index of the material of the high refractive index film layer in the anti-reflection film disclosed herein may be greater than 2.0, and the refractive index of the material of the low refractive index film layer may be less than 1.8. The materials of the high refractive index film layer and the low refractive index film layer (refractive index at a wavelength of 587.6 nm) can be, for example, magnesium fluoride (MgF ₂ , 1.3777), silicon dioxide (SiO ₂ , 1.4585), thorium fluoride (ThF ₄ , 1.5125), silicon monoxide (SiO , 1.55), calcium fluoride (CeF ₃ , 1.63), aluminum oxide (Al ₂ O ₃ , 1.7682), yttrium trioxide (Y ₂ O ₃ , 1.79), helium dioxide (HfO ₂ , 1.8935), zinc oxide (ZnO, 1.9269), scabbard oxide (Sc ₂ O ₃ , 1.9872), aluminum nitride (AlN, 2.0294), silicon nitride (Si ₃ N ₄ , 2.0381), tantalum pentoxide (Ta ₂ O ₅ , 2.1306), zirconium dioxide (ZrO ₂ , 2.1588), zinc sulfide (ZnS, 2.2719), niobium pentoxide (Nb ₂ O ₅ , 2.3403), titanium dioxide (TiO ₂ , 2.6142), titanium nitride (TiN, 3.1307). Or it can be a mixed material of magnesium fluoride-silicon dioxide (MgF ₂ -SiO ₂ ), wherein the content ratio of each component can be, for example, [SiO ₂ ] > [MgF ₂ ].

The electronic device disclosed herein may also be a vehicle device, a mobile device, an aviation device, or a surveillance device.

The present disclosure provides an electronic device, which includes the aforementioned imaging device, thereby improving the imaging quality. Preferably, the aforementioned electronic device can further include a control unit, a display unit, a storage unit, a temporary storage unit or a combination thereof.

The imaging optical lens provided by the present disclosure can also be widely used in three-dimensional (3D) image capture, digital cameras, mobile products, digital tablets, smart TVs, network monitoring equipment, somatosensory game consoles, driving recorders, reversing display devices, wearable products or drones and other electronic devices.

The imaging device can capture images corresponding to a non-circular opening on the outer side of the electronic device.

Based on the above description, specific embodiments are presented below for detailed description.

<First embodiment>

Please refer to Fig. 1, which is a schematic diagram of an imaging device 1 according to the first embodiment of the present disclosure. As can be seen from Fig. 1, the imaging device 1 of the first embodiment includes an imaging optical lens (not labeled) and an electronic photosensitive element IS. The imaging optical lens includes an optical lens E1, an optical lens E2, an aperture ST, an optical lens E3, an optical lens E4, an optical lens E5, a filter element FL1, a filter element FL2 and an imaging surface IMG in sequence from the object side to the image side of the optical path, and the electronic photosensitive element IS is arranged on the imaging surface IMG of the imaging optical lens, wherein the imaging optical lens includes five optical lenses (E1, E2, E3, E4, E5), there are no other interpolated optical lenses between the five optical lenses, and there is an air distance between each two adjacent optical lenses on the optical axis.

Each optical lens has an object side surface and an image side surface. The optical lens E1 is made of glass and includes two anti-reflection films C1 and C2, which are respectively located on the object side surface and the image side surface of the optical lens E1. The optical lens E2, the optical lens E3, the optical lens E4 and the optical lens E5 are made of plastic.

The full viewing angle of the imaging device 1 is FOV, which satisfies the condition: FOV = 124 degrees. The distance from the object side surface of the optical lens E1 to the image side surface of the optical lens E5 is TD, which satisfies the condition: TD = 12 mm. The horizontal displacement of the object side surface and the image side surface of the optical lens E1, the optical lens E2, the optical lens E3, the optical lens E4 and the optical lens E5 at the maximum effective diameter is SAG, which satisfies the condition: 0.98 mm ≤ |SAG| ≤ 1.59 mm. The maximum value of the effective diameter of all optical lens surfaces is SDmax. In the first embodiment, SDmax is the effective diameter of the object side surface of the optical lens E1 and satisfies the condition: SDmax = 8 mm.

The thickness of the optical lens E1 on the optical axis is CT, which satisfies the condition: CT = 1.0 mm. The refractive index of the optical lens E1 is Ns, which satisfies the condition: Ns = 1.80. The dispersion coefficient of the optical lens E1 is Vs, which satisfies the condition: Vs = 46.5. The water resistance level of the optical lens E1 is RW, which satisfies the condition: RW = 1. The water resistance of the optical lens E1 is Dw, which satisfies the condition: Dw ≤ 0.05. The acid resistance level of the optical lens E1 is RA, which satisfies the condition: RA = 4. The acid resistance of the optical lens E1 is Da, which satisfies the condition: 0.65 ≤ Da ≤ 1.20.

The water resistance of the optical lens E1 is Dw, the refractive index of the optical lens E1 is Ns, and the condition is: Ns×Dw×100 ≤ 9. The acid resistance of the optical lens E1 is Da, the refractive index of the optical lens E1 is Ns, and the condition is: 1.2 ≤ Ns×Da ≤ 2.2. The water resistance of the optical lens E1 is Dw, the dispersion coefficient of the optical lens E1 is Vs, and the condition is: Vs×Dw ≤ 2.3. The acid resistance of the optical lens E1 is Da, the dispersion coefficient of the optical lens E1 is Vs, and the condition is: 3.0 ≤ Vs×Da/10 ≤ 5.6.

The horizontal displacement of the object side surface of optical lens E1 at the maximum effective diameter is SAG, which satisfies the condition: |SAG| = 0.98 mm. The effective diameter of the object side surface of optical lens E1 is SD, which satisfies the condition: |SD|×2 = 8.08. The horizontal displacement of the image side surface of optical lens E1 at the maximum effective diameter is SAG, which satisfies the condition: |SAG| = 1.59 mm. The effective diameter of the image side surface of optical lens E1 is SD, which satisfies the condition: |SD|×2 = 4.79.

Detailed parameters of the imaging device 1 of the first embodiment are listed in the following Table 1, wherein the optical lens composition "1G4P" indicates that the imaging device 1 of the first embodiment includes an optical lens made of glass material and four optical lenses made of plastic material. Table 1 Optical lens components 1G4P Optical lens position for molded glass without FOV (degrees) 124 TD (mm) 12 SDmax (mm) 8 E1 Object side surface E1 CT (mm) 1.0 N 1.80 Vs 46.5 Material (Glass/Molded Glass/Plastic) Glass R 1 Dw (lower limit/upper limit) 0.05 RA 4 Da (lower limit/upper limit) 0.65 1.20 Ns×Dw×100 9 NxD 1.2 2.2 Vs×Dw 2.3 Vs×Da/10 3.0 5.6 Object side surface |SAG| 0.98 |SD|×2 8.08 Image side surface |SAG| 1.59 |SD|×2 4.79

<Second embodiment>

The imaging device of the second embodiment includes an imaging optical lens and an electronic photosensitive element. The imaging optical lens includes an optical lens E1, an optical lens E2, an optical lens E3, an optical lens E4, an optical lens E5, an optical lens E6, an optical lens E7 and an imaging surface from the object side to the image side of the optical path, and the electronic photosensitive element is arranged on the imaging surface of the imaging optical lens, wherein the imaging optical lens includes seven optical lenses (E1, E2, E3, E4, E5, E6, E7), there are no other interpolated optical lenses between the seven optical lenses, and there is an air distance between each two adjacent optical lenses on the optical axis.

Each optical lens has an object side surface and an image side surface. The optical lens E1 is made of molded glass and includes an anti-reflection film on at least one of the object side surface and the image side surface of the optical lens E1. The optical lens E2, the optical lens E3, the optical lens E4, the optical lens E5, the optical lens E6 and the optical lens E7 are made of plastic.

The detailed parameters of the imaging device of the second embodiment are listed in the following Table 2, wherein the optical lens composition "1MG6P" indicates that the imaging device of the second embodiment includes an optical lens made of molded glass material and six optical lenses made of plastic material. The rest of the parameter definitions in Table 2 are the same as those of the first embodiment and will not be repeated here. Table 2 Optical lens components 1MG6P Optical lens position for molded glass E1 FOV (degrees) 80 TD (mm) 6 SDmax (mm) 4 E1 Object side surface E1 CT (mm) 1.1 N 1.59 Vs 67.0 Material (Glass/Molded Glass/Plastic) Molded glass R 1 Dw (lower limit/upper limit) 0.05 RA 4 Da (lower limit/upper limit) 0.65 1.20 Ns×Dw×100 8 NxD 1.0 1.9 Vs×Dw 3.4 Vs×Da/10 4.4 8.0 Object side surface |SAG| 0.91 |SD|×2 3.70 Image side surface |SAG| 0.21 |SD|×2 3.37

<Third Embodiment>

The imaging device of the third embodiment includes an imaging optical lens and an electronic photosensitive element. The imaging optical lens includes an optical lens E1, an optical lens E2, an optical lens E3, an optical lens E4, an optical lens E5, an optical lens E6 and an imaging surface from the object side to the image side of the optical path, and the electronic photosensitive element is arranged on the imaging surface of the imaging optical lens, wherein the imaging optical lens includes six optical lenses (E1, E2, E3, E4, E5, E6), there are no other interpolated optical lenses between the six optical lenses, and there is an air distance between each two adjacent optical lenses on the optical axis.

Each optical lens has an object side surface and an image side surface. The optical lens E3 is made of glass and includes an anti-reflection film on at least one of the object side surface and the image side surface of the optical lens E3. The optical lens E1, the optical lens E2, the optical lens E4, the optical lens E5 and the optical lens E6 are made of plastic.

The detailed parameters of the imaging device of the third embodiment are listed in Table 3 below. The parameter definitions in Table 3 are the same as those of the first embodiment and will not be described again here. table 3 Optical lens components 1G5P Optical lens position for molded glass without FOV (degrees) 20 TD (mm) 7 SDmax (mm) 3 E3 Object side surface E3 CT (mm) 1.0 N 1.49 Vs 70.4 Material (Glass/Molded Glass/Plastic) Glass R 2 Dw (lower limit/upper limit) 0.05 0.10 RA 4 Da (lower limit/upper limit) 0.65 1.20 Ns×Dw×100 7 15 NxD 1.0 1.8 Vs×Dw 3.5 7.0 Vs×Da/10 4.6 8.5 Object side surface |SAG| 0.27 |SD|×2 3.03 Image side surface |SAG| 0.05 |SD|×2 2.79

<Fourth embodiment>

The imaging device of the fourth embodiment includes an imaging optical lens and an electronic photosensitive element. The imaging optical lens includes an optical lens E1, an optical lens E2, an optical lens E3, an optical lens E4, an optical lens E5, an optical lens E6, an optical lens E7 and an imaging surface from the object side to the image side of the optical path, and the electronic photosensitive element is disposed on the imaging surface of the imaging optical lens, wherein the imaging optical lens includes seven optical lenses (E1, E2, E3, E4, E5, E6, E7), there are no other interpolated optical lenses between the seven optical lenses, and there is an air distance between each two adjacent optical lenses on the optical axis.

Each optical lens has an object side surface and an image side surface. The optical lens E4 is made of glass and includes an anti-reflection film located on at least one of the object side surface and the image side surface of the optical lens E4. The optical lens E1, the optical lens E2, the optical lens E3, the optical lens E5, the optical lens E6 and the optical lens E7 are made of plastic.

The detailed parameters of the imaging device of the fourth embodiment are listed in Table 4 below. The parameter definitions in Table 4 are the same as those of the first embodiment and will not be described again here. Table 4 Optical lens components 1G6P Optical lens position for molded glass without FOV (degrees) 36 TD (mm) twenty four SDmax (mm) 7 E4 Object side surface E4 CT (mm) 1.5 N 1.52 Vs 64.2 Material (Glass/Molded Glass/Plastic) Glass R 3 Dw (lower limit/upper limit) 0.10 0.25 RA 1 Da (lower limit/upper limit) 0.20 Ns×Dw×100 15 38 NxD 0.3 Vs×Dw 6.4 16.1 Vs×Da/10 1.3 Object side surface |SAG| 0.11 |SD|×2 7.13 Image side surface |SAG| 0.79 |SD|×2 7.00

<Fifth Embodiment>

The imaging device of the fifth embodiment includes an imaging optical lens and an electronic photosensitive element. The imaging optical lens includes, from the object side to the image side of the optical path, optical lens E1, optical lens E2, optical lens E3, optical lens E4, optical lens E5, optical lens E6, optical lens E7, optical lens E8, optical lens E9 and an imaging surface, and the electronic photosensitive element is arranged on the imaging surface of the imaging optical lens, wherein the imaging optical lens includes nine optical lenses (E1, E2, E3, E4, E5, E6, E7, E8, E9), there are no other interpolated optical lenses between the nine optical lenses, and there is an air distance between each two adjacent optical lenses on the optical axis.

Each optical lens has an object side surface and an image side surface. The optical lens E4 is made of glass and includes an anti-reflection film located on at least one of the object side surface and the image side surface of the optical lens E4. The optical lens E1, the optical lens E2, the optical lens E3, the optical lens E5, the optical lens E6, the optical lens E7, the optical lens E8 and the optical lens E9 are made of plastic.

The detailed parameters of the imaging device of the fifth embodiment are listed in Table 5 below. The parameter definitions in Table 5 are the same as those of the first embodiment and will not be described again here. table 5 Optical lens components 1G8P Optical lens position for molded glass without FOV (degrees) 32 TD (mm) twenty two SDmax (mm) 6 E4 Object side surface E4 CT (mm) 1.4 N 1.52 Vs 64.2 Material (Glass/Molded Glass/Plastic) Glass R 3 Dw (lower limit/upper limit) 0.10 0.25 RA 1 Da (lower limit/upper limit) 0.20 Ns×Dw×100 15 38 NxD 0.3 Vs×Dw 6.4 16.1 Vs×Da/10 1.3 Object side surface |SAG| 0.48 |SD|×2 6.32 Image side surface |SAG| 0.19 |SD|×2 6.00

<Sixth embodiment>

The imaging device of the sixth embodiment includes an imaging optical lens and an electronic photosensitive element. The imaging optical lens includes an optical lens E1, an optical lens E2, an optical lens E3, an optical lens E4, an optical lens E5, an optical lens E6 and an imaging surface from the object side to the image side of the optical path, and the electronic photosensitive element is arranged on the imaging surface of the imaging optical lens, wherein the imaging optical lens includes six optical lenses (E1, E2, E3, E4, E5, E6), there are no other interpolated optical lenses between the six optical lenses, and there is an air distance between each two adjacent optical lenses on the optical axis.

Each optical lens has an object side surface and an image side surface. The optical lens E1 and the optical lens E2 are made of glass, and the optical lens E1 and the optical lens E2 each include an anti-reflection film, and the anti-reflection film is located on at least one of the object side surface and the image side surface of the optical lens E1 and the optical lens E2. The optical lens E3, the optical lens E4, the optical lens E5 and the optical lens E6 are made of plastic.

The detailed parameters of the imaging device of the sixth embodiment are listed in the following Table 6. The parameter definitions in Table 6 are the same as those of the first embodiment and will not be described again here. Table 6 Optical lens components 2G4P Optical lens position for molded glass without FOV (degrees) 80 TD (mm) 9 SDmax (mm) 5 E1 Object side surface E1 E2 CT (mm) 0.6 2.6 N 1.83 1.81 Vs 37.2 40.9 Material (Glass/Molded Glass/Plastic) Glass Glass R 1 1 Dw (lower limit/upper limit) 0.05 0.05 RA 3 3 Da (lower limit/upper limit) 0.35 0.65 0.35 0.65 Ns×Dw×100 9 9 NxD 0.6 1.2 0.6 1.2 Vs×Dw 1.9 2.1 Vs×Da/10 1.3 2.4 1.4 2.7 Object side surface |SAG| 0.99 0.37 |SD|×2 5.47 3.86 Image side surface |SAG| 1.11 0.04 |SD|×2 4.27 1.88

<Seventh Embodiment>

The imaging device of the seventh embodiment includes an imaging optical lens and an electronic photosensitive element. The imaging optical lens includes an optical lens E1, an optical lens E2, an optical lens E3, an optical lens E4, an optical lens E5, an optical lens E6 and an imaging surface from the object side to the image side of the optical path, and the electronic photosensitive element is disposed on the imaging surface of the imaging optical lens, wherein the imaging optical lens includes six optical lenses (E1, E2, E3, E4, E5, E6), there are no other interpolated optical lenses between the six optical lenses, and there is an air distance between each two adjacent optical lenses on the optical axis.

Each optical lens has an object side surface and an image side surface. The optical lens E1, the optical lens E2, the optical lens E3, the optical lens E4, the optical lens E5 and the optical lens E6 are made of glass, and the optical lens E1, the optical lens E2, the optical lens E3, the optical lens E4, the optical lens E5 and the optical lens E6 respectively include an anti-reflection film, and the anti-reflection film is respectively located on at least one of the object side surface and the image side surface of the optical lens E1, the optical lens E2, the optical lens E3, the optical lens E4, the optical lens E5 and the optical lens E6.

The detailed parameters of the imaging device of the seventh embodiment are listed in Table 7 below. The parameter definitions in Table 7 are the same as those of the first embodiment and will not be described again here. Table 7 Optical lens components 6G Optical lens position for molded glass without FOV (degrees) 58 TD (mm) 17 SDmax (mm) 8 E1 Object side surface E1 E2 E3 E4 CT (mm) 1.1 2.8 1.6 3.1 N 1.78 1.92 1.80 1.80 Vs 25.7 18.9 46.6 46.6 Material (Glass/Molded Glass/Plastic) Glass Glass Glass Glass R 1 1 1 1 Dw (lower limit/upper limit) 0.05 0.05 0.05 0.05 RA 1 1 3 3 Da (lower limit/upper limit) 0.20 0.20 0.35 0.65 0.35 0.65 Ns×Dw×100 9 10 9 9 NxD 0.4 0.4 0.6 1.2 0.6 1.2 Vs×Dw 1.3 1.0 2.3 2.3 Vs×Da/10 0.5 0.4 1.6 3.0 1.6 3.0 Object side surface |SAG| 1.41 1.09 0.29 0.21 |SD|×2 8.33 6.32 4.42 4.41 Image side surface |SAG| 1.87 0.75 0.05 0.96 |SD|×2 6.34 4.44 3.98 5.82 E5 E6 CT (mm) 4.5 0.8 N 1.77 1.85 Vs 49.6 23.8 Material (Glass/Molded Glass/Plastic) Glass Glass R 1 1 Dw (lower limit/upper limit) 0.05 0.05 RA 3 1 Da (lower limit/upper limit) 0.35 0.65 0.20 Ns×Dw×100 9 9 NxD 0.6 1.2 0.4 Vs×Dw 2.5 1.2 Vs×Da/10 1.7 3.2 0.5 Object side surface |SAG| 0.62 0.90 |SD|×2 6.11 5.72 Image side surface |SAG| 0.91 0.19 |SD|×2 5.73 5.60

<Eighth Embodiment>

The imaging device of the eighth embodiment includes an imaging optical lens and an electronic photosensitive element. The imaging optical lens includes an optical lens E1, an optical lens E2, an optical lens E3, an optical lens E4, an optical lens E5, an optical lens E6 and an imaging surface from the object side to the image side of the optical path, and the electronic photosensitive element is disposed on the imaging surface of the imaging optical lens, wherein the imaging optical lens includes six optical lenses (E1, E2, E3, E4, E5, E6), there are no other interpolated optical lenses between the six optical lenses, and there is an air distance between each two adjacent optical lenses on the optical axis.

Each optical lens has an object side surface and an image side surface. The optical lens E1, the optical lens E2, the optical lens E3, the optical lens E4, the optical lens E5 and the optical lens E6 are made of glass, and the optical lens E1, the optical lens E2, the optical lens E3, the optical lens E4, the optical lens E5 and the optical lens E6 respectively include an anti-reflection film, and the anti-reflection film is respectively located on at least one of the object side surface and the image side surface of the optical lens E1, the optical lens E2, the optical lens E3, the optical lens E4, the optical lens E5 and the optical lens E6.

The detailed parameters of the imaging device of the eighth embodiment are listed in Table 8 below. The parameter definitions in Table 8 are the same as those of the first embodiment and will not be described again here. Table 8 Optical lens components 6G Optical lens position for molded glass without FOV (degrees) 35 TD (mm) 15 SDmax (mm) 9 E1 Object side surface E1 E2 E3 E4 CT (mm) 0.8 2.4 2.2 2.8 N 1.70 1.82 1.81 1.83 Vs 30.1 46.6 40.9 37.2 Material (Glass/Molded Glass/Plastic) Glass Glass Glass Glass R 1 1 1 1 Dw (lower limit/upper limit) 0.05 0.05 0.05 0.05 RA 1 2 3 3 Da (lower limit/upper limit) 0.20 0.20 0.35 0.35 0.65 0.35 0.65 Ns×Dw×100 8 9 9 9 NxD 0.3 0.4 0.6 0.6 1.2 0.6 1.2 Vs×Dw 1.5 2.3 2.1 1.9 Vs×Da/10 0.6 0.9 1.6 1.4 2.7 1.3 2.4 Object side surface |SAG| 0.49 0.78 1.30 0.40 |SD|×2 9.12 8.15 6.58 4.58 Image side surface |SAG| 1.45 0.20 0.78 0.60 |SD|×2 8.13 7.75 4.63 5.44 E5 E6 CT (mm) 3.6 0.7 N 1.82 1.81 Vs 46.6 25.4 Material (Glass/Molded Glass/Plastic) Glass Glass R 1 1 Dw (lower limit/upper limit) 0.05 0.05 RA 2 1 Da (lower limit/upper limit) 0.20 0.35 0.20 Ns×Dw×100 9 9 NxD 0.4 0.6 0.4 Vs×Dw 2.3 1.3 Vs×Da/10 0.9 1.6 0.5 Object side surface |SAG| 0.35 1.06 |SD|×2 5.77 5.83 Image side surface |SAG| 1.06 0.00 |SD|×2 5.83 5.85

<Ninth Embodiment>

The imaging device of the ninth embodiment includes an imaging optical lens and an electronic photosensitive element. The imaging optical lens includes an optical lens E1, an optical lens E2, an optical lens E3, an optical lens E4, an optical lens E5, an optical lens E6 and an imaging surface from the object side to the image side of the optical path, and the electronic photosensitive element is disposed on the imaging surface of the imaging optical lens, wherein the imaging optical lens includes six optical lenses (E1, E2, E3, E4, E5, E6), there are no other interpolated optical lenses between the six optical lenses, and there is an air distance between each two adjacent optical lenses on the optical axis.

Each optical lens has an object side surface and an image side surface. The optical lens E1, the optical lens E2, the optical lens E3, the optical lens E4, the optical lens E5 and the optical lens E6 are made of glass, and the optical lens E1, the optical lens E2, the optical lens E3, the optical lens E4, the optical lens E5 and the optical lens E6 respectively include an anti-reflection film, and the anti-reflection film is respectively located on at least one of the object side surface and the image side surface of the optical lens E1, the optical lens E2, the optical lens E3, the optical lens E4, the optical lens E5 and the optical lens E6.

The detailed parameters of the imaging device of the ninth embodiment are listed in Table 9 below. The parameter definitions in Table 9 are the same as those of the first embodiment and will not be described again here. Table 9 Optical lens components 6G Optical lens position for molded glass without FOV (degrees) 135 TD (mm) 18 SDmax (mm) 10 E1 Object side surface E1 E2 E3 E4 CT (mm) 1.0 0.8 2.3 4.0 N 1.88 1.77 1.73 1.80 Vs 40.8 49.6 28.3 46.6 Material (Glass/Molded Glass/Plastic) Glass Glass Glass Glass R 1 1 1 1 Dw (lower limit/upper limit) 0.05 0.05 0.05 0.05 RA 1 3 1 3 Da (lower limit/upper limit) 0.20 0.35 0.65 0.20 0.35 0.65 Ns×Dw×100 9 9 9 9 NxD 0.4 0.6 1.2 0.4 0.6 1.2 Vs×Dw 2.0 2.5 1.4 2.3 Vs×Da/10 0.8 1.7 3.2 0.6 1.6 3.0 Object side surface |SAG| 1.18 0.63 0.54 0.18 |SD|×2 10.39 5.39 4.15 3.10 Image side surface |SAG| 2.12 0.92 0.33 0.40 |SD|×2 6.14 4.39 2.93 4.07 E5 E6 CT (mm) 4.0 0.8 N 1.68 1.96 Vs 55.3 17.5 Material (Glass/Molded Glass/Plastic) Glass Glass R 2 1 Dw (lower limit/upper limit) 0.05 0.10 0.05 RA 5 1 Da (lower limit/upper limit) 1.20 2.20 0.20 Ns×Dw×100 8 17 10 NxD 2.0 3.7 0.4 Vs×Dw 2.8 5.5 0.9 Vs×Da/10 6.6 12.2 0.4 Object side surface |SAG| 0.29 0.85 |SD|×2 4.20 4.36 Image side surface |SAG| 0.85 0.24 |SD|×2 4.36 4.77

<Tenth Embodiment>

The imaging device of the tenth embodiment includes an imaging optical lens and an electronic photosensitive element. The imaging optical lens includes an optical lens E1, an optical lens E2, an optical lens E3, an optical lens E4, an optical lens E5, an optical lens E6, an optical lens E7 and an imaging surface from the object side to the image side of the optical path, and the electronic photosensitive element is disposed on the imaging surface of the imaging optical lens, wherein the imaging optical lens includes seven optical lenses (E1, E2, E3, E4, E5, E6, E7), there are no other interpolated optical lenses between the seven optical lenses, and there is an air distance between each two adjacent optical lenses on the optical axis.

Each optical lens has an object side surface and an image side surface. The optical lens E1, the optical lens E2, the optical lens E4, the optical lens E5 and the optical lens E6 are made of glass, the optical lens E3 and the optical lens E7 are made of molded glass, and the optical lens E1, the optical lens E2, the optical lens E3, the optical lens E4, the optical lens E5, the optical lens E6 and the optical lens E7 respectively include an anti-reflection film, and the anti-reflection film is respectively located on at least one of the object side surface and the image side surface of the optical lens E1, the optical lens E2, the optical lens E3, the optical lens E4, the optical lens E5, the optical lens E6 and the optical lens E7.

The detailed parameters of the imaging device of the tenth embodiment are listed in the following Table 10. The parameter definitions in Table 10 are the same as those of the first and second embodiments and will not be described again here. Table 10 Optical lens components 2MG5G Optical lens position for molded glass E3, E7 FOV (degrees) 100 TD (mm) 25 SDmax (mm) 13 E1 Object side surface E1 E2 E3 E4 CT (mm) 1.0 0.8 2.2 2.6 N 1.57 1.52 1.85 1.74 Vs 56.1 64.2 40.6 44.9 Material (Glass/Molded Glass/Plastic) Glass Glass Molded glass Glass R 1 3 1 1 Dw (lower limit/upper limit) 0.05 0.10 0.25 0.05 0.05 RA 1 1 5 3 Da (lower limit/upper limit) 0.20 0.20 1.20 2.20 0.35 0.65 Ns×Dw×100 8 15 38 9 9 NxD 0.3 0.3 2.2 4.1 0.6 1.1 Vs×Dw 2.8 6.4 16.1 2.0 2.3 Vs×Da/10 1.1 1.3 4.9 8.9 1.6 2.9 Object side surface |SAG| 0.40 0.92 0.52 1.03 |SD|×2 12.62 8.27 8.47 9.62 Image side surface |SAG| 2.50 0.55 0.35 0.57 |SD|×2 8.60 8.31 8.61 9.70 E5 E6 E7 CT (mm) 3.4 0.8 5.0 N 1.62 1.95 1.85 Vs 63.9 17.9 40.6 Material (Glass/Molded Glass/Plastic) Glass Glass Molded glass R 1 1 1 Dw (lower limit/upper limit) 0.05 0.05 0.05 RA 4 1 5 Da (lower limit/upper limit) 0.65 1.20 0.20 1.20 2.20 Ns×Dw×100 8 10 9 NxD 1.1 2.0 0.4 2.2 4.1 Vs×Dw 3.2 0.9 2.0 Vs×Da/10 4.2 7.7 0.4 4.9 8.9 Object side surface |SAG| 1.14 1.25 0.73 |SD|×2 9.35 8.86 7.97 Image side surface |SAG| 1.26 0.05 0.93 |SD|×2 8.87 8.49 10.16

＜Eleventh Embodiment＞

The imaging device of the eleventh embodiment includes an imaging optical lens and an electronic photosensitive element. The imaging optical lens includes an optical lens E1, an optical lens E2, an optical lens E3, an optical lens E4, an optical lens E5, an optical lens E6, an optical lens E7, an optical lens E8 and an imaging surface from the object side to the image side of the optical path, and the electronic photosensitive element is disposed on the imaging surface of the imaging optical lens, wherein the imaging optical lens includes eight optical lenses (E1, E2, E3, E4, E5, E6, E7, E8), there are no other interpolated optical lenses between the eight optical lenses, and there is an air distance between each two adjacent optical lenses on the optical axis.

Each optical lens has an object side surface and an image side surface. The optical lens E2, the optical lens E3, the optical lens E4, the optical lens E6, the optical lens E7 and the optical lens E8 are made of glass, the optical lens E1 and the optical lens E5 are made of molded glass, and the optical lens E1, the optical lens E2, the optical lens E3, the optical lens E4, the optical lens E5, the optical lens E6, the optical lens E7 and the optical lens E8 are made of glass. Lens E6, optical lens E7 and optical lens E8 respectively include an anti-reflection film, and the anti-reflection film is respectively located on at least one of the object side surface and the image side surface of optical lens E1, optical lens E2, optical lens E3, optical lens E4, optical lens E5, optical lens E6, optical lens E7 and optical lens E8.

The detailed parameters of the imaging device of the eleventh embodiment are listed in the following Table 11. The parameter definitions in Table 11 are the same as those of the first and second embodiments and will not be described in detail here. Table 11 Optical lens components 2MG6G Optical lens position for molded glass E1, E5 FOV (degrees) 95 TD (mm) 27 SDmax (mm) 12 E5 Object side surface E1 E2 E3 E4 CT (mm) 0.9 1.9 2.2 3.3 N 1.81 1.92 1.60 1.62 Vs 40.7 18.9 38.0 63.4 Material (Glass/Molded Glass/Plastic) Molded glass Glass Glass Glass R 1 1 2 1 Dw (lower limit/upper limit) 0.05 0.05 0.05 0.10 0.05 RA 3 1 1 4 Da (lower limit/upper limit) 0.35 0.65 0.20 0.20 0.65 1.20 Ns×Dw×100 9 10 8 16 8 NxD 0.6 1.2 0.4 0.3 1.1 1.9 Vs×Dw 2.0 1.0 1.9 3.8 3.2 Vs×Da/10 1.4 2.7 0.4 0.8 4.1 7.6 Object side surface |SAG| 0.43 0.09 0.51 0.41 |SD|×2 8.66 5.90 5.30 8.53 Image side surface |SAG| 1.20 0.29 0.41 1.56 |SD|×2 6.57 5.37 8.53 9.87 E5 E6 E7 E8 CT (mm) 4.9 3.6 0.7 4.8 N 1.69 1.80 1.85 1.62 Vs 53.2 46.6 23.8 58.2 Material (Glass/Molded Glass/Plastic) Molded glass Glass Glass Glass R 1 1 1 2 Dw (lower limit/upper limit) 0.05 0.05 0.05 0.05 0.10 RA 4 3 1 4 Da (lower limit/upper limit) 0.65 1.20 0.35 0.65 0.20 0.25 0.60 Ns×Dw×100 8 9 9 8 16 NxD 1.1 2.0 0.6 1.2 0.4 0.4 1.0 Vs×Dw 2.7 2.3 1.2 2.9 5.8 Vs×Da/10 3.5 6.4 1.6 3.0 0.5 1.5 3.5 Object side surface |SAG| 1.19 0.69 1.52 1.52 |SD|×2 12.11 11.46 10.94 10.79 Image side surface |SAG| 1.36 1.52 1.43 0.40 |SD|×2 12.11 10.94 9.67 10.06

＜Twelfth Embodiment＞

The imaging device of the twelfth embodiment includes an imaging optical lens and an electronic photosensitive element. The imaging optical lens includes an optical lens E1, an optical lens E2, an optical lens E3, an optical lens E4, an optical lens E5, an optical lens E6, an optical lens E7, an optical lens E8 and an imaging surface from the object side to the image side of the optical path, and the electronic photosensitive element is arranged on the imaging surface of the imaging optical lens, wherein the imaging optical lens includes eight optical lenses (E1, E2, E3, E4, E5, E6, E7, E8), there are no other interpolated optical lenses between the eight optical lenses, and there is an air distance between each two adjacent optical lenses on the optical axis.

Each optical lens has an object side surface and an image side surface. The optical lens E1, the optical lens E2, the optical lens E3, the optical lens E4, the optical lens E5, the optical lens E6 and the optical lens E7 are made of glass, the optical lens E8 is made of molded glass, and the optical lens E1, the optical lens E2, the optical lens E3, the optical lens E4, the optical lens E5, the optical lens E6 and the optical lens E7 are made of glass. Lens E6, optical lens E7 and optical lens E8 respectively include an anti-reflection film, and the anti-reflection film is respectively located on at least one of the object side surface and the image side surface of optical lens E1, optical lens E2, optical lens E3, optical lens E4, optical lens E5, optical lens E6, optical lens E7 and optical lens E8.

The detailed parameters of the imaging device of the twelfth embodiment are listed in the following Table 12. The parameter definitions in Table 12 are the same as those of the first and second embodiments and will not be described in detail here. Table 12 Optical lens components 1MG7G Optical lens position for molded glass E8 FOV (degrees) 101 TD (mm) 26 SDmax (mm) 11 E1 Object side surface E1 E2 E3 E4 CT (mm) 0.7 1.7 1.5 4.0 N 1.52 1.80 1.83 1.50 Vs 64.2 46.6 42.7 81.6 Material (Glass/Molded Glass/Plastic) Glass Glass Glass Glass R 3 1 1 1 Dw (lower limit/upper limit) 0.10 0.25 0.05 0.05 0.05 RA 1 3 2 2 Da (lower limit/upper limit) 0.20 0.35 0.65 0.20 0.35 0.20 0.35 Ns×Dw×100 15 38 9 9 7 NxD 0.3 0.6 1.2 0.4 0.6 0.3 0.5 Vs×Dw 6.4 16.1 2.3 2.1 4.1 Vs×Da/10 1.3 1.6 3.0 0.9 1.5 1.6 2.9 Object side surface |SAG| 0.16 1.18 0.37 0.23 |SD|×2 11.34 6.97 7.45 9.26 Image side surface |SAG| 2.11 0.97 0.40 2.27 |SD|×2 8.01 7.65 7.79 9.66 E5 E6 E7 E8 CT (mm) 0.7 0.7 3.7 3.3 N 1.65 1.95 1.77 1.69 Vs 33.8 17.9 49.6 53.2 Material (Glass/Molded Glass/Plastic) Glass Glass Glass Molded glass R 2 1 1 1 Dw (lower limit/upper limit) 0.05 0.10 0.05 0.05 0.05 RA 1 1 3 4 Da (lower limit/upper limit) 0.20 0.20 0.35 0.65 0.25 0.60 Ns×Dw×100 8 16 10 9 8 NxD 0.3 0.4 0.6 1.2 0.4 1.0 Vs×Dw 1.7 3.4 0.9 2.5 2.7 Vs×Da/10 0.7 0.4 1.7 3.2 1.3 3.2 Object side surface |SAG| 2.27 1.47 2.46 0.99 |SD|×2 9.66 11.06 10.33 9.25 Image side surface |SAG| 1.02 2.46 0.13 0.76 |SD|×2 10.52 10.32 9.96 10.45

<Thirteenth Embodiment>

The imaging device of the thirteenth embodiment includes an imaging optical lens and an electronic photosensitive element. The imaging optical lens includes, from the object side to the image side of the optical path, optical lens E1, optical lens E2, optical lens E3, optical lens E4, optical lens E5, optical lens E6, optical lens E7, optical lens E8, optical lens E9 and an imaging surface, and the electronic photosensitive element is arranged on the imaging surface of the imaging optical lens, wherein the imaging optical lens includes nine optical lenses (E1, E2, E3, E4, E5, E6, E7, E8, E9), there are no other interpolated optical lenses between the nine optical lenses, and there is an air distance between each two adjacent optical lenses on the optical axis.

Each optical lens has an object side surface and an image side surface. The optical lens E1, the optical lens E2, the optical lens E3, the optical lens E4, the optical lens E5, the optical lens E6, the optical lens E7 and the optical lens E9 are made of glass, the optical lens E8 is made of molded glass, and the optical lens E1, the optical lens E2, the optical lens E3, the optical lens E4, the optical lens E5, the optical lens E6, the optical lens E7 and the optical lens E9 are made of glass. 6. The optical lens E7, the optical lens E8 and the optical lens E9 respectively include an anti-reflection film, and the anti-reflection film is respectively located on at least one of the object side surface and the image side surface of the optical lens E1, the optical lens E2, the optical lens E3, the optical lens E4, the optical lens E5, the optical lens E6, the optical lens E7, the optical lens E8 and the optical lens E9.

The detailed parameters of the imaging device of the thirteenth embodiment are listed in the following Table 13. The parameter definitions in Table 13 are the same as those of the first and second embodiments and will not be described in detail here. Table 13 Optical lens components 1MG8G Optical lens position for molded glass E8 FOV (degrees) 181 TD (mm) twenty one SDmax (mm) 11 E1 Object side surface E1 E2 E3 E4 CT (mm) 0.8 0.7 0.7 0.7 N 1.90 1.49 2.00 1.95 Vs 31.4 70.4 25.4 17.9 Material (Glass/Molded Glass/Plastic) Glass Glass Glass Glass R 1 2 1 1 Dw (lower limit/upper limit) 0.05 0.05 0.10 0.05 0.05 RA 1 4 1 1 Da (lower limit/upper limit) 0.20 0.65 1.20 0.20 0.20 Ns×Dw×100 10 7 15 10 10 NxD 0.4 1.0 1.8 0.4 0.4 Vs×Dw 1.6 3.5 7.0 1.3 0.9 Vs×Da/10 0.6 4.6 8.5 0.5 0.4 Object side surface |SAG| 2.18 0.45 0.50 0.10 |SD|×2 11.28 5.60 3.84 3.47 Image side surface |SAG| 2.65 0.60 0.43 0.03 |SD|×2 5.76 4.38 3.89 3.86 E5 E6 E7 E8 CT (mm) 2.8 3.3 0.7 4.3 N 1.73 1.73 1.95 1.81 Vs 54.7 54.7 17.9 41.0 Material (Glass/Molded Glass/Plastic) Glass Glass Glass Molded glass R 1 1 1 1 Dw (lower limit/upper limit) 0.05 0.05 0.05 0.05 RA 3 3 1 6 Da (lower limit/upper limit) 0.35 0.65 0.35 0.65 0.20 2.20 Ns×Dw×100 9 9 10 0 9 NxD 0.6 1.1 0.6 1.1 0.4 4.0 Vs×Dw 2.7 2.7 0.9 0.0 2.1 Vs×Da/10 1.9 3.6 1.9 3.6 0.4 9.0 Object side surface |SAG| 0.11 0.46 1.85 1.98 |SD|×2 5.55 7.26 7.24 9.96 Image side surface |SAG| 0.84 1.86 0.16 0.68 |SD|×2 6.70 7.24 8.11 9.20 E9 CT (mm) 0.7 N 2.00 Vs 25.4 Material (Glass/Molded Glass/Plastic) Glass R 1 Dw (lower limit/upper limit) 0.05 RA 1 Da (lower limit/upper limit) 0.20 Ns×Dw×100 10 NxD 0.4 Vs×Dw 1.3 Vs×Da/10 0.5 Object side surface |SAG| 0.95 |SD|×2 9.07 Image side surface |SAG| 0.00 |SD|×2 8.93

＜Arrangement of anti-reflection film＞

The following further explains and compares the anti-reflection film configurations of the first to third comparative examples and the first to third embodiments. The anti-reflection film configurations of the first and second comparative examples are listed in Table 14 below. Table 14 First comparison example Second comparison example PVD ALD Number of layers Material Refractive Index Physical thickness (nm) Number of layers Material Refractive Index Physical thickness (nm) Substrate Plastic 1.55 - Substrate Glass 1.82 - 1 _TiO2 2.35 14 1 _TiO2 2.31 9 2 SiO ₂ 1.46 33 2 SiO ₂ 1.47 63 3 _TiO2 2.35 56 3 _TiO2 2.31 5 4 SiO ₂ 1.46 9 4 Al ₂ O ₃ Gradient 224 5 _TiO2 2.35 42 6 SiO ₂ 1.46 92 Total film thickness (tTK, nm) 246 Total film thickness (tTK, nm) 301

The anti-reflection film configurations of the third comparative example and the first embodiment are listed in Table 15 below. Table 15 The third comparison example First Embodiment ALD ALD Number of layers Material Refractive Index Physical thickness (nm) Number of layers Material Refractive Index Physical thickness (nm) Substrate Glass 1.82 - Substrate Glass 1.82 - 1 Al ₂ O ₃ 1.64 36 1 Al ₂ O ₃ 1.64 36 2 _TiO2 2.31 9 2 _TiO2 2.31 9 3 SiO ₂ 1.47 63 3 SiO ₂ 1.47 63 4 _TiO2 2.31 5 4 _TiO2 2.31 5 5 Al ₂ O ₃ Gradient 224 Total film thickness (tTK, nm) 113 Total film thickness (tTK, nm) 337

The first film layer of the first embodiment of the present disclosure contacts the surface of the optical lens, and is made of Al ₂ O ₃ , has a film thickness of 36 nm, and a refractive index of 1.64; the second film layer is on top of and contacts the first film layer, and is made of TiO ₂ , has a film thickness of 9 nm, and a refractive index of 2.31; the third film layer is on top of and contacts the second film layer, and is made of SiO ₂ , has a film thickness of 63 nm, and a refractive index of 1.47; the fourth film layer is on top of and contacts the third film layer, and is made of TiO ₂ , has a film thickness of 5 nm, and a refractive index of 2.31; the fifth film layer is on top of and contacts the fourth film layer, and is made of Al ₂ O ₃ , has a film thickness of 224 nm, and a refractive index of 1.47; nm, its refractive index changes in a gradient, and the farther away from the optical lens, the smaller the refractive index.

The TNL in the present disclosure represents the total film thickness of the entire low refractive index film layer, TL1 represents the film thickness of the first film layer, and TL3 represents the film thickness of the third film layer. The TNL of the first embodiment is the sum of TL1 and TL3, that is, TNL = TL1+TL3, which satisfies the condition: TNL = 99 nm.

The TNH in the present disclosure represents the total film thickness of the entire high refractive index film layer, TL2 represents the film thickness of the second film layer, and TL4 represents the film thickness of the fourth film layer. The TNH of the first embodiment is the sum of TL2 and TL4, that is, TNH = TL2+TL4, which satisfies the condition: TNH = 14 nm.

TNG in the present disclosure represents the thickness of the gradient refractive index film, TL5 represents the thickness of the fifth film layer, and TNG in the first embodiment is TL5, so TNG/tTK = TL5/tTK, which satisfies the condition: TNG/tTK = 0.66.

The anti-reflection film configurations of the second and third embodiments are listed in Table 16 below. The parameter definitions in Table 16 are the same as those in the previous paragraph and will not be repeated here. Table 16 Second Embodiment Third Embodiment ALD ALD Number of layers Material Refractive Index Physical thickness (nm) Number of layers Material Refractive Index Physical thickness (nm) Substrate Glass 1.95 - Substrate Glass 1.68 - 1 Al ₂ O ₃ 1.64 29 1 Al ₂ O ₃ 1.64 61 2 _TiO2 2.31 13 2 _TiO2 2.31 3 3 SiO ₂ 1.47 58 3 SiO ₂ 1.47 66 4 _TiO2 2.31 6 4 _TiO2 2.31 3 5 Al ₂ O ₃ Gradient 224 5 Al ₂ O ₃ Gradient 224 Total film thickness (tTK, nm) 330 Total film thickness (tTK, nm) 357 TNG/tTK (= TL5/tTK) 0.68 TNG/tTK (= TL5/tTK) 0.63 TNL (= TL1+TL3, nm) 87 TNL (= TL1+TL3, nm) 127 TNH (= TL2+TL4, nm) 19 TNH (= TL2+TL4, nm) 6

The above results were all tested with a reference wavelength of 510 nm and an incident angle of 0 degrees.

It can be seen from Tables 14 to 16 that the anti-reflection film disclosed in the present invention has an appropriate film layer configuration. By controlling the film thickness of the gradient refractive index film and maintaining the optimal hole structure, the optimal gradient refractive index design is effectively achieved to enhance the anti-reflection effect of light incident at a large angle and avoid reducing the anti-reflection effect due to insufficient film thickness. Furthermore, by controlling the high refractive index film layer and the low refractive index film layer to reach a specific thickness, the reflected light is easily destructively interfered on the surface of the spaced film layers, which helps to enhance the anti-reflection effect.

＜Measurement results of thickness of anti-reflection film＞

The anti-reflection films of the first comparative example and the first to third embodiments were measured, and the measurement results of the total thickness (Tc) of the anti-reflection film located at the center of the optical lens and the total thickness (Tp) of the anti-reflection film located at the periphery of the optical lens are listed in Table 17 below. Table 17 First comparison example First Embodiment Second Embodiment Third Embodiment Total thickness at center (Tc) (nm) Total thickness at periphery (Tp) (nm) Total thickness at center (Tc) (nm) Total thickness at periphery (Tp) (nm) Total thickness at center (Tc) (nm) Total thickness at periphery (Tp) (nm) Total thickness at center (Tc) (nm) Total thickness at periphery (Tp) (nm) 246.65 208.02 336.60 336.00 330.00 329.00 357.00 356.00 |Tc-Tp|/Tc |Tc-Tp|/Tc |Tc-Tp|/Tc |Tc-Tp|/Tc 18.57% 0.18% 0.30% 0.28%

It can be seen from Table 17 that the difference in total thickness of the anti-reflection film of the present disclosure at the center and the periphery of the optical lens is extremely small, which proves that the thickness of the anti-reflection film of the present disclosure is quite uniform, which not only effectively solves the defect of reflected light caused by the inability to uniformly coat the film when the peripheral surface deformation changes violently, but also helps to improve the anti-reflection effect of the surface with large angle incidence of light.

＜Reflectivity measurement results at different wavelengths＞

The reflectances of the first comparative example, the third comparative example, and the first to third embodiments at different wavelengths are measured below. The reflectance measurement results of the first comparative example and the third comparative example are listed in Table 18 below. Table 18 First comparison example The third comparison example Total number of optical lenses 7 6 Position of optical lenses including anti-reflection coating (from object side to image side) 6 3 Coating surface Object side surface and image side surface Object side surface and image side surface R4060 (%) 1.82 0.76 2.83 3.18 R4070 (%) 1.33 0.70 2.95 3.29 R40100 (%) 1.56 0.89 3.49 3.87 R5060 (%) 0.43 0.66 3.03 3.31 R5070 (%) 0.38 0.62 3.10 3.42 R70100 (%) 1.76 1.07 4.04 4.45 R80100 (%) 2.45 1.33 4.27 4.70 R90100 (%) 4.55 1.97 4.51 4.93 Reflectivity(%) Wavelength(nm) Center (0 degrees) Periphery (0 degrees) Center (0 degrees) Center (30 degrees) 400 30.73 2.33 1.82 2.40 405 16.78 1.33 1.97 2.53 410 7.17 0.88 2.11 2.65 415 2.44 0.72 2.23 2.76 420 0.88 0.74 2.34 2.85 425 0.67 0.80 2.44 2.93 430 0.79 0.86 2.53 2.99 435 0.81 0.92 2.60 3.04 440 0.70 0.94 2.66 3.09 445 0.52 0.92 2.72 3.13 450 0.37 0.89 2.77 3.16 455 0.28 0.83 2.81 3.19 460 0.26 0.79 2.85 3.21 465 0.30 0.73 2.88 3.23 470 0.36 0.68 2.91 3.25 475 0.43 0.65 2.93 3.26 480 0.48 0.62 2.95 3.27 485 0.50 0.61 2.97 3.27 490 0.49 0.60 2.98 3.28 495 0.47 0.60 2.99 3.29 500 0.43 0.61 3.00 3.29 505 0.39 0.62 3.00 3.29 510 0.36 0.63 3.01 3.29 515 0.34 0.65 3.01 3.29 520 0.33 0.67 3.01 3.29 525 0.34 0.68 3.01 3.29 530 0.36 0.69 3.02 3.29 535 0.38 0.70 3.02 3.29 540 0.41 0.70 3.02 3.29 545 0.44 0.70 3.02 3.30 550 0.46 0.70 3.02 3.30 555 0.48 0.70 3.02 3.31 560 0.49 0.69 3.03 3.31 565 0.49 0.68 3.03 3.31 570 0.49 0.67 3.03 3.32 575 0.49 0.66 3.03 3.32 580 0.49 0.64 3.04 3.33 585 0.48 0.63 3.04 3.34 590 0.47 0.62 3.05 3.35 595 0.46 0.61 3.06 3.36 600 0.45 0.60 3.06 3.37 605 0.45 0.59 3.07 3.38 610 0.44 0.58 3.08 3.39 615 0.43 0.58 3.09 3.41 620 0.42 0.57 3.10 3.42 625 0.41 0.57 3.11 3.43 630 0.40 0.57 3.12 3.45 635 0.39 0.57 3.13 3.46 640 0.37 0.57 3.14 3.48 645 0.36 0.57 3.16 3.50 650 0.34 0.57 3.17 3.51 655 0.32 0.57 3.19 3.53 660 0.30 0.57 3.20 3.55 665 0.29 0.58 3.22 3.57 670 0.27 0.58 3.23 3.59 675 0.25 0.58 3.25 3.61 680 0.24 0.58 3.27 3.63 685 0.23 0.58 3.29 3.65 690 0.22 0.58 3.30 3.67 695 0.22 0.58 3.32 3.70 700 0.22 0.57 3.34 3.72 705 0.23 0.57 3.36 3.74 710 0.23 0.57 3.38 3.76 715 0.25 0.56 3.40 3.78 720 0.26 0.56 3.42 3.81 725 0.28 0.55 3.44 3.83 730 0.30 0.54 3.47 3.86 735 0.32 0.54 3.49 3.88 740 0.34 0.53 3.51 3.91 745 0.36 0.52 3.54 3.93 750 0.38 0.51 3.56 3.96 755 0.39 0.50 3.58 3.98 760 0.41 0.50 3.61 4.01 765 0.41 0.49 3.63 4.03 770 0.42 0.48 3.65 4.06 775 0.42 0.48 3.68 4.08 780 0.41 0.47 3.70 4.11 785 0.40 0.47 3.72 4.13 790 0.38 0.47 3.75 4.16 795 0.37 0.47 3.77 4.18 800 0.34 0.47 3.79 4.21 805 0.32 0.48 3.82 4.23 810 0.28 0.48 3.84 4.26 815 0.25 0.49 3.87 4.29 820 0.22 0.50 3.89 4.31 825 0.18 0.51 3.92 4.34 830 0.16 0.53 3.94 4.36 835 0.13 0.55 3.97 4.39 840 0.11 0.57 3.99 4.41 845 0.09 0.59 4.02 4.44 850 0.09 0.62 4.04 4.46 855 0.09 0.65 4.07 4.49 860 0.11 0.69 4.09 4.51 865 0.14 0.72 4.11 4.54 870 0.19 0.77 4.14 4.56 875 0.25 0.81 4.16 4.59 880 0.34 0.86 4.19 4.61 885 0.44 0.91 4.21 4.64 890 0.57 0.96 4.23 4.66 895 0.72 1.02 4.26 4.68 900 0.89 1.08 4.28 4.71 905 1.09 1.15 4.31 4.73 910 1.31 1.22 4.33 4.75 915 1.57 1.30 4.35 4.78 920 1.85 1.38 4.38 4.80 925 2.15 1.46 4.40 4.82 930 2.49 1.54 4.42 4.84 935 2.86 1.63 4.44 4.87 940 3.24 1.72 4.47 4.89 945 3.66 1.82 4.49 4.91 950 4.10 1.92 4.51 4.93 955 4.57 2.02 4.53 4.96 960 5.06 2.13 4.55 4.98 965 5.57 2.23 4.58 5.00 970 6.12 2.34 4.60 5.02 975 6.67 2.45 4.62 5.04 980 7.25 2.57 4.64 5.06 985 7.85 2.69 4.66 5.08 990 8.45 2.81 4.68 5.10 995 9.07 2.93 4.70 5.12 1000 9.72 3.05 4.72 5.14

The reflectivity measurement results of the first to third embodiments are listed in Table 19 below. Table 19 First Embodiment Second Embodiment Third Embodiment Total number of optical lenses 6 6 6 Position of optical lenses with anti-reflection coating (from object side to image side) 3 2 1 Coating surface Object side surface and image side surface Object side surface and image side surface Object side surface and image side surface R4060 (%) 0.02 0.02 0.03 0.03 R4070 (%) 0.02 0.02 0.03 0.02 R40100 (%) 0.05 0.12 0.05 0.07 R5060 (%) 0.02 0.02 0.02 0.03 R5070 (%) 0.02 0.02 0.03 0.02 R70100 (%) 0.08 0.22 0.06 0.11 R80100 (%) 0.11 0.31 0.08 0.16 R90100 (%) 0.18 0.44 0.14 0.24 Reflectivity(%) Wavelength(nm) Center (0 degrees) Center (30 degrees) Center (0 degrees) Center (0 degrees) 400 0.08 0.00 0.06 0.06 405 0.05 0.00 0.03 0.05 410 0.03 0.01 0.02 0.04 415 0.02 0.01 0.02 0.03 420 0.01 0.02 0.02 0.03 425 0.01 0.03 0.02 0.02 430 0.01 0.03 0.03 0.02 435 0.02 0.04 0.04 0.02 440 0.02 0.04 0.04 0.02 445 0.02 0.04 0.04 0.02 450 0.03 0.04 0.05 0.02 455 0.03 0.04 0.05 0.02 460 0.03 0.04 0.05 0.02 465 0.03 0.04 0.05 0.02 470 0.03 0.04 0.05 0.02 475 0.03 0.03 0.05 0.02 480 0.03 0.03 0.05 0.02 485 0.03 0.03 0.04 0.02 490 0.03 0.03 0.04 0.02 495 0.03 0.02 0.03 0.02 500 0.03 0.02 0.03 0.02 505 0.03 0.02 0.03 0.02 510 0.03 0.02 0.02 0.02 515 0.02 0.02 0.02 0.02 520 0.02 0.02 0.02 0.03 525 0.02 0.02 0.01 0.03 530 0.02 0.02 0.01 0.03 535 0.02 0.01 0.01 0.03 540 0.02 0.02 0.01 0.03 545 0.01 0.02 0.01 0.03 550 0.01 0.02 0.01 0.03 555 0.01 0.02 0.01 0.03 560 0.01 0.02 0.01 0.03 565 0.01 0.02 0.01 0.03 570 0.01 0.02 0.01 0.03 575 0.01 0.02 0.02 0.03 580 0.01 0.02 0.02 0.03 585 0.02 0.02 0.02 0.03 590 0.02 0.02 0.02 0.03 595 0.02 0.02 0.03 0.03 600 0.02 0.03 0.03 0.03 605 0.02 0.03 0.03 0.03 610 0.02 0.03 0.03 0.03 615 0.02 0.03 0.03 0.03 620 0.02 0.03 0.04 0.03 625 0.02 0.03 0.04 0.03 630 0.02 0.03 0.04 0.03 635 0.02 0.03 0.04 0.02 640 0.02 0.03 0.04 0.02 645 0.02 0.03 0.04 0.02 650 0.02 0.03 0.04 0.02 655 0.02 0.03 0.04 0.02 660 0.02 0.03 0.04 0.02 665 0.02 0.03 0.04 0.02 670 0.02 0.03 0.04 0.02 675 0.02 0.03 0.04 0.02 680 0.02 0.03 0.04 0.01 685 0.02 0.03 0.04 0.01 690 0.02 0.03 0.04 0.01 695 0.02 0.03 0.04 0.01 700 0.02 0.03 0.04 0.01 705 0.02 0.03 0.03 0.01 710 0.02 0.03 0.03 0.01 715 0.02 0.03 0.03 0.01 720 0.01 0.03 0.03 0.01 725 0.01 0.03 0.03 0.01 730 0.01 0.03 0.02 0.01 735 0.01 0.03 0.02 0.01 740 0.01 0.03 0.02 0.01 745 0.01 0.04 0.02 0.01 750 0.01 0.04 0.01 0.01 755 0.01 0.04 0.01 0.01 760 0.01 0.04 0.01 0.01 765 0.01 0.05 0.01 0.01 770 0.01 0.05 0.01 0.01 775 0.01 0.05 0.01 0.02 780 0.01 0.06 0.00 0.02 785 0.01 0.06 0.00 0.02 790 0.01 0.07 0.00 0.02 795 0.01 0.07 0.00 0.03 800 0.01 0.08 0.00 0.03 805 0.01 0.08 0.00 0.03 810 0.01 0.09 0.00 0.04 815 0.01 0.10 0.00 0.04 820 0.01 0.11 0.00 0.04 825 0.02 0.11 0.00 0.05 830 0.02 0.12 0.00 0.05 835 0.02 0.13 0.00 0.06 840 0.02 0.14 0.01 0.06 845 0.03 0.15 0.01 0.07 850 0.03 0.16 0.01 0.07 855 0.03 0.17 0.01 0.08 860 0.04 0.18 0.02 0.08 865 0.04 0.19 0.02 0.09 870 0.05 0.20 0.02 0.10 875 0.05 0.21 0.03 0.10 880 0.06 0.23 0.03 0.11 885 0.06 0.24 0.04 0.12 890 0.07 0.25 0.04 0.13 895 0.08 0.27 0.05 0.13 900 0.08 0.28 0.05 0.14 905 0.09 0.29 0.06 0.15 910 0.10 0.31 0.07 0.16 915 0.11 0.32 0.07 0.17 920 0.12 0.34 0.08 0.18 925 0.12 0.35 0.09 0.19 930 0.13 0.37 0.10 0.20 935 0.14 0.39 0.11 0.21 940 0.15 0.40 0.12 0.22 945 0.16 0.42 0.13 0.23 950 0.17 0.44 0.14 0.24 955 0.18 0.46 0.15 0.25 960 0.20 0.47 0.16 0.26 965 0.21 0.49 0.17 0.27 970 0.22 0.51 0.18 0.28 975 0.23 0.53 0.19 0.29 980 0.24 0.55 0.21 0.31 985 0.26 0.57 0.22 0.32 990 0.27 0.59 0.23 0.33 995 0.28 0.61 0.25 0.34 1000 0.30 0.63 0.26 0.35

Please refer to Figures 2 to 6, Figure 2 is a graph showing the relationship between the reflectivity and wavelength of the first comparative example, Figure 3 is a graph showing the relationship between the reflectivity and wavelength of the third comparative example, Figure 4 is a graph showing the relationship between the reflectivity and wavelength of the first embodiment, Figure 5 is a graph showing the relationship between the reflectivity and wavelength of the second embodiment, and Figure 6 is a graph showing the relationship between the reflectivity and wavelength of the third embodiment. It can be seen from Table 18, Table 19 and Figures 2 to 6 that the imaging device of the present disclosure can effectively provide an anti-reflection effect in a wide wavelength range and solve the serious reflection problem of light incident at a large angle.

＜Antioxidant properties test＞

Please refer to FIG. 7A and FIG. 7B together. FIG. 7A is a surface quality image of the optical lens substrate of the second comparative example, and FIG. 7B is a surface quality image of the optical lens substrate of the first embodiment. It can be seen from FIG. 7A and FIG. 7B that the optical lens substrate of the second comparative example has been obviously oxidized, and the surface shows spot defects, while the optical lens substrate of the first embodiment has an anti-oxidation effect and excellent surface quality, which shows that the anti-reflection film of the imaging device of the present disclosure can provide the optical lens substrate with an anti-oxidation effect.

<Fourteenth Embodiment>

Please refer to FIG. 8, which shows a stereoscopic schematic diagram of an imaging device 100 according to the fourteenth embodiment of the present disclosure. As can be seen from FIG. 8, the imaging device 100 of the fourteenth embodiment is a camera module, and the imaging device 100 includes an imaging lens 101, a drive device assembly 102, and an electronic photosensitive element 103, wherein the imaging lens 101 includes the imaging optical lens of the present disclosure and a lens barrel (not separately labeled) carrying the imaging optical lens. The imaging device 100 uses the imaging lens 101 to focus and photograph the object and cooperates with the drive device assembly 102 to focus the image, and finally forms an image on the electronic photosensitive element 103 and outputs the image data.

The driving device assembly 102 may be an autofocus module, and its driving method may use a driving system such as a voice coil motor, a micro-electromechanical system, a piezoelectric system, or a memory metal. The driving device assembly 102 allows the imaging optical lens to obtain a better imaging position, and can provide a clear image of the object under different object distances.

The imaging device 100 may be equipped with an electronic photosensitive element 103 (such as CMOS, CCD) with good sensitivity and low noise, which is disposed on the imaging surface of the imaging optical lens, and can truly present the good imaging quality of the imaging optical lens. In addition, the imaging device 100 may further include an image stabilization module 104, which may be a kinetic energy sensing element such as an accelerometer, a gyroscope or a Hall Effect Sensor. In the fourteenth embodiment, the image stabilization module 104 is a gyroscope, but is not limited thereto. By adjusting the changes in different axial directions of the imaging optical lens to compensate for the blurred image caused by shaking at the moment of shooting, the imaging quality of dynamic and low-light scene shooting is further improved, and advanced image compensation functions such as Optical Image Stabilization (OIS) and Electronic Image Stabilization (EIS) are provided.

<Fifteenth Embodiment>

Please refer to Figures 9A, 9B and 9C, wherein Figure 9A shows a schematic diagram of one side of an electronic device 200 according to the fifteenth embodiment of the present disclosure, Figure 9B shows a schematic diagram of the other side of the electronic device 200 in Figure 9A, and Figure 9C shows a system schematic diagram of the electronic device 200 in Figure 9A. As can be seen from FIG. 9A, FIG. 9B and FIG. 9C, the electronic device 200 of the fifteenth embodiment is a smart phone, and the electronic device 200 includes imaging devices 100, 110, 120, 130, 140, a flash module 201, a focus assist module 202, an image signal processor 203 (Image Signal Processor; ISP), a user interface 204 and an image software processor 205, wherein the imaging devices 120, 130, 140 are front lenses. When the user takes a picture of the subject 206 through the user interface 204, the electronic device 200 uses the imaging devices 100, 110, 120, 130, 140 to focus and capture the image, activates the flash module 201 for fill light, and uses the subject distance information provided by the focus assist module 202 for rapid focusing. In addition, the image signal processor 203 and the image software processor 205 perform image optimization processing to further improve the image quality produced by the image lens. The focus assist module 202 may use an infrared or laser focus assist system to achieve fast focus, and the user interface 204 may use a touch screen or a physical capture button to perform image capture and image processing in conjunction with the diverse functions of the image processing software.

At least one of the imaging devices 100, 110, 120, 130, and 140 in the fifteenth embodiment may include the imaging optical lens of the present disclosure, and may be the same as or have a similar structure to the imaging device 100 in the fourteenth embodiment, which will not be described in detail. In detail, the imaging devices 100 and 110 in the fifteenth embodiment may be a wide-angle imaging device and an ultra-wide-angle imaging device, or may be a wide-angle imaging device and a telephoto imaging device, respectively, and the imaging devices 120, 130, and 140 may be a wide-angle imaging device, an ultra-wide-angle imaging device, and a TOF module (Time-Of-Flight), respectively, but are not limited to this configuration. In addition, the connection relationship between the imaging devices 110, 120, 130, 140 and other components can be the same as the imaging device 100 shown in FIG. 9C, or can be adaptively adjusted according to the type of imaging device, which will not be separately illustrated or described in detail herein.

<Sixteenth Embodiment>

Please refer to FIG. 10 , which is a schematic diagram of one side of an electronic device 300 according to the sixteenth embodiment of the present disclosure. The electronic device 300 of the sixteenth embodiment is a smart phone, and the electronic device 300 includes imaging devices 310 , 320 , 330 and a flash module 301 .

The electronic device 300 of the sixteenth embodiment may include the same or similar elements as those in the aforementioned fifteenth embodiment, and the connection relationship between the imaging devices 310, 320, 330 and other elements may also be the same or similar to that disclosed in the fifteenth embodiment, which is not further described here. The imaging devices 310, 320, 330 in the sixteenth embodiment may all include the imaging optical lens of the present disclosure, and may all be the same as or have a similar structure to the imaging device 100 in the aforementioned fourteenth embodiment, which is not further described here. In detail, the imaging device 310 may be an ultra-wide-angle imaging device, the imaging device 320 may be a wide-angle imaging device, the imaging device 330 may be a telephoto imaging device (which may include an optical path deflection element), or may be other types of imaging devices, and are not limited to this configuration.

<Seventeenth Embodiment>

Please refer to FIG. 11 , which shows a schematic diagram of a side of an electronic device 400 according to the seventeenth embodiment of the present disclosure. The electronic device 400 of the seventeenth embodiment is a smart phone, and the electronic device 400 includes imaging devices 410 , 420 , 430 , 440 , 450 , 460 , 470 , 480 , 490 and a flash module 401 .

The electronic device 400 of the seventeenth embodiment may include the same or similar components as those in the fifteenth embodiment, and the connection relationship between the imaging devices 410, 420, 430, 440, 450, 460, 470, 480, 490 and the flash module 401 and other components may also be the same or similar to that disclosed in the fifteenth embodiment, which will not be further described here. The imaging devices 410, 420, 430, 440, 450, 460, 470, 480, 490 in the seventeenth embodiment may all include the imaging optical lens of the present disclosure, and may all have the same or similar structure as the imaging device 100 in the fourteenth embodiment, which will not be further described here.

In detail, imaging devices 410 and 420 may be ultra-wide-angle imaging devices, imaging devices 430 and 440 may be wide-angle imaging devices, imaging devices 450 and 460 may be telephoto imaging devices, imaging devices 470 and 480 may be telephoto imaging devices (which may include optical path bending elements), imaging device 490 may be a TOF module, or may be other types of imaging devices, and is not limited to this configuration.

<Eighteenth Embodiment>

Please refer to FIG. 12A and FIG. 12B, wherein FIG. 12A is a schematic diagram of one side of an electronic device 500 according to the eighteenth embodiment of the present disclosure, and FIG. 12B is a schematic diagram of another side of the electronic device 500 in FIG. 12A. As can be seen from FIG. 12A and FIG. 12B, the electronic device 500 of the eighteenth embodiment is a smart phone, and the electronic device 500 includes imaging devices 510, 520, 530, 540 and a user interface 504.

The electronic device 500 of the eighteenth embodiment may include the same or similar components as those in the fifteenth embodiment, and the connection relationship between the imaging devices 510, 520, 530, 540 and the user interface 504 and other components may also be the same or similar to that disclosed in the fifteenth embodiment, and will not be further described here. In detail, the imaging device 510 may correspond to a non-circular opening on the outer side of the electronic device to capture images, and the imaging devices 520, 530, 540 are respectively telephoto imaging devices, wide-angle imaging devices, and ultra-wide-angle imaging devices, or may be other types of imaging devices, and are not limited to this configuration.

<Nineteenth Embodiment>

Please refer to FIG. 13A, which shows a top view of a vehicle tool 600 according to the nineteenth embodiment of the present disclosure. As shown in FIG. 13A, the vehicle tool 600 includes a plurality of camera modules 610. The camera module 610 may include an imaging optical lens of any of the aforementioned embodiments and an electronic photosensitive element (not shown), and the electronic photosensitive element is disposed on an imaging surface (not shown) of the imaging optical lens, but the present disclosure is not limited thereto.

Please refer to FIG. 13B and FIG. 13C, wherein FIG. 13B shows a partially enlarged schematic diagram of the vehicle tool 600 according to FIG. 13A, and FIG. 13C shows another schematic diagram of the vehicle tool 600 according to FIG. 13A. As shown in FIG. 13A and FIG. 13B, the camera module 610 can be set in the space inside the vehicle tool 600. Specifically, the camera module 610 is respectively set near the rearview mirror inside the vehicle and near the rear window. Furthermore, the camera module 610 can be respectively set on the non-mirror surface of the left and right rearview mirrors of the vehicle tool 600. As shown in FIG. 13C , the configuration of the camera module 610 helps the driver to obtain external spatial information outside the cockpit, such as external spatial information S1, S2, S3, and S4, but the present disclosure is not limited thereto. In this way, more viewing angles can be provided to reduce blind spots, thereby helping to improve driving safety.

The present disclosure applies multi-layer coating technology to the surface of an optical lens or optical element of an imaging optical lens, and uses a combination of high and low refractive index films and gradient refractive index films to exert an excellent anti-reflection effect, thereby reducing the problem of severe reflection in the peripheral area of the optical lens caused by light incident on the optical lens surface at a large angle, effectively improving the transmittance of the imaging optical lens, and achieving the best anti-reflection effect.

The present disclosure utilizes a uniform and dense anti-reflection film to significantly enhance the material's anti-oxidation ability, thereby achieving the effect of protecting optical lenses and optical components. The present disclosure utilizes atomic layer deposition technology to achieve precise control of film thickness and maintain overall coating uniformity, and is suitable for high-end imaging optical lenses with high degrees of freedom in curved surface design.

The present disclosure uses the optical interference phenomenon to reduce the reflected light by alternately stacking a plurality of high-refractive-index film layers and low-refractive-index film layers, using the difference in refractive index and the appropriate film thickness to adjust the design so that light can interfere destructively on the film surface. The gradient refractive-index film has a pore structure with a gradient size and a gradient refractive index, which effectively provides an anti-reflection effect in a wide wavelength range and solves the serious reflection problem of light incident at a large angle.

The disclosed content achieves atomic-scale precision through atomic layer deposition technology, is no longer limited by the geometric shape of the imaging optical lens surface, can accurately control the film thickness and uniform coating ability, and helps to improve the degree of freedom of variation in the surface design of the optical lens. A uniform and dense anti-reflection film is deposited on the surface of the imaging optical lens, which can effectively block water and oxygen in the air from further contacting the surface of the imaging optical lens, so that optical lenses with poor water and acid resistance have significant antioxidant ability, which helps to improve the quality of optical lenses and optical components to meet the needs of imaging optical lenses with high imaging quality.

Although the contents of this disclosure have been disclosed as above by way of embodiments, they are not intended to limit the contents of this disclosure. Anyone skilled in the art can make various changes and modifications without departing from the spirit and scope of the contents of this disclosure. Therefore, the protection scope of the contents of this disclosure shall be subject to the scope of the attached patent application.

200,300,400,500: Electronic devices 1,100,110,120,130,140,310,320,330,410,420,430,440,450,460,470,480,490,510,520,530,540: Image acquisition device 101: Imaging lens 102: Drive device assembly 103: Electronic photosensitive element 104: Image stabilization module 201,301,401: Flash module 202: Focus assist module 203: Image signal processor 204,504: User interface 205: Image software processor 206: Object 600: Vehicle tools 610: Camera module S1, S2, S3, S4: External spatial information ST: Aperture IMG: Imaging surface IS: Electronic photosensitive element Tc: Total thickness of anti-reflection film at the center of the optical lens Tp: Total thickness of anti-reflection film at the periphery of the optical lens tTK: Total thickness of anti-reflection film TNG: Thickness of gradient refractive index film TNH: Total thickness of high refractive index film layer TNL: Total thickness of low refractive index film layer TL1: Thickness of low refractive index film layer in contact with the optical lens TL2: Thickness of the second film layer TL3: Thickness of the third film layer TL4: Thickness of the fourth film layer TL5: Thickness of the fifth film layer TD: Distance from the object side surface of the first optical lens to the image side surface of the last optical lens NH: Refractive index of the high refractive index film layer NL: Refractive index of the low refractive index film layer SAG: Horizontal displacement of the surface of the optical lens at the maximum effective diameter SD: Effective diameter of the surface of the optical lens SDmax: Maximum value of the effective diameter of all optical lens surfaces R4060: Average reflectivity of the optical lens at wavelengths of 400 nm to 600 nm R4070: Average reflectivity of the optical lens at wavelengths of 400 nm to 700 nm R40100: Average reflectivity of the optical lens at wavelengths of 400 nm to 1000 nm R5060: Average reflectivity of the optical lens at wavelengths of 500 nm to 600 nm average reflectivity R5070: Average reflectivity of optical lens at wavelengths of 500 nm to 700 nm R70100: Average reflectivity of optical lens at wavelengths of 700 nm to 1000 nm R80100: Average reflectivity of optical lens at wavelengths of 800 nm to 1000 nm R90100: Average reflectivity of optical lens at wavelengths of 900 nm to 1000 nm RW: Water resistance of optical lens RA: Acid resistance of optical lens Vs: Dispersion coefficient of optical lens Ns: Refractive index of optical lens Da: Acid resistance of optical lens Dw: Water resistance of optical lens FOV: Full viewing angle of imaging optical lens CT: Thickness of optical lens on the optical axis E1, E2, E3, E4, E5, E6, E7, E8, E9: Optical lenses C1, C2: Anti-reflection film FL1, FL2: Filter elements

In order to make the above and other purposes, features, advantages and embodiments of the present disclosure more clearly understandable, the attached drawings are described as follows: Figure 1 is a schematic diagram of an imaging device according to the first embodiment of the present disclosure; Figure 2 is a diagram showing the relationship between the reflectivity and wavelength of the first comparative example; Figure 3 is a diagram showing the relationship between the reflectivity and wavelength of the third comparative example; Figure 4 is a diagram showing the relationship between the reflectivity and wavelength of the first embodiment; Figure 5 is a diagram showing the relationship between the reflectivity and wavelength of the second embodiment; Figure 6 is a diagram showing the relationship between the reflectivity and wavelength of the third embodiment; Figure 7A is a surface quality diagram of an optical lens substrate of the second comparative example; Figure 7B is a surface quality diagram of an optical lens substrate of the first embodiment; Figure 8 is a three-dimensional schematic diagram of an imaging device according to the fourteenth embodiment of the present disclosure; FIG. 9A is a schematic diagram of one side of an electronic device according to the fifteenth embodiment of the present disclosure; FIG. 9B is a schematic diagram of the other side of the electronic device in FIG. 9A; FIG. 9C is a system schematic diagram of the electronic device in FIG. 9A; FIG. 10 is a schematic diagram of one side of an electronic device according to the sixteenth embodiment of the present disclosure; FIG. 11 is a schematic diagram of one side of an electronic device according to the seventeenth embodiment of the present disclosure; FIG. 12A is a schematic diagram of one side of an electronic device according to the eighteenth embodiment of the present disclosure; FIG. 12B is a schematic diagram of the other side of the electronic device in FIG. 12A; FIG. 13A is a top view of a vehicle tool according to the nineteenth embodiment of the present disclosure; FIG. 13B is a partially enlarged schematic diagram of the vehicle tool according to FIG. 13A; and FIG. 13C is another schematic diagram of the vehicle tool according to FIG. 13A.

1: Imaging device

ST: aperture

IMG: Imaging surface

IS: Electronic photosensitive element

E1,E2,E3,E4,E5: Optical lenses

C1, C2: Anti-reflection film

FL1, FL2: filter element

Claims (24)

An imaging optical lens, comprising: At least one optical lens; Wherein, the optical lens is made of glass, and the optical lens comprises an anti-reflection film, and the anti-reflection film is located on at least one surface of the optical lens; Wherein, the anti-reflection film comprises a high-low refractive index film and a gradient refractive index film, and the high-low refractive index film is arranged between the optical lens and the gradient refractive index film; Wherein, the high-low refractive index film comprises at least one high refractive index film layer and at least one low refractive index film layer, and the high refractive index film layer and the low refractive index film layer are alternately stacked, and the low refractive index film layer contacts the optical lens, and the main material of the low refractive index film layer is aluminum oxide; The gradient refractive index film includes a plurality of holes, the holes far from the optical lens are relatively larger than the holes close to the optical lens, and the main material of the gradient refractive index film is metal oxide; The total thickness of the anti-reflection film located at the center of the optical lens is Tc, and the total thickness of the anti-reflection film located at the periphery of the optical lens is Tp, which meets the following conditions: 0% ＜ |Tc-Tp|/Tc ≤ 15.0%. An imaging optical lens as described in claim 1, wherein the total film thickness of the anti-reflection film is tTK, which satisfies the following conditions: 200 nm ≤ tTK ≤ 800 nm. An imaging optical lens as described in claim 1, wherein the refractive index of the high refractive index film layer is NH, which satisfies the following conditions: 2.00 ≤ NH. An imaging optical lens as described in claim 1, wherein the refractive index of the low refractive index film layer is NL, which satisfies the following conditions: NL ≤ 1.80. An imaging optical lens as described in claim 1, wherein the total film thickness of the high refractive index film layer is TNH, which satisfies the following conditions: 1 nm ≤ TNH ≤ 60 nm. An imaging optical lens as described in claim 1, wherein the total film thickness of the low refractive index film layer is TNL, which satisfies the following conditions: 1 nm ≤ TNL ≤ 300 nm. An imaging optical lens as described in claim 1, wherein the thickness of the low refractive index film layer contacting the optical lens is TL1, which satisfies the following conditions: 10 nm ≤ TL1 ≤ 100 nm. An imaging optical lens as described in claim 1, wherein the film thickness of the gradient refractive index film is TNG, and the total film thickness of the anti-reflection film is tTK, which satisfies the following conditions: 0.45 ≤ TNG/tTK ≤ 0.85. An imaging optical lens as described in claim 1, wherein the material of the gradient refractive index film is aluminum oxide. The imaging optical lens as described in claim 1, wherein the total thickness of the anti-reflection film located at the center of the optical lens is Tc, and the total thickness of the anti-reflection film located at the periphery of the optical lens is Tp, which satisfies the following conditions: 0% ＜ |Tc-Tp|/Tc ≤ 10.0%. An imaging optical lens as described in claim 1, wherein the horizontal displacement of the surface of the optical lens at the maximum effective diameter is SAG, and the total film thickness of the anti-reflection film is tTK, which satisfies the following conditions: 0 ≤ |SAG|/tTK ≤ 10.0. An imaging optical lens as described in claim 1, wherein the average reflectivity of the optical lens at a wavelength of 400 nm to 1000 nm is R40100, which satisfies the following conditions: 0% ＜ R40100 ≤ 1.00%. An imaging optical lens as described in claim 1, wherein the average reflectivity of the optical lens at a wavelength of 400 nm to 700 nm is R4070, which satisfies the following conditions: 0% ＜ R4070 ≤ 1.00%. An imaging optical lens as described in claim 1, wherein the average reflectivity of the optical lens at a wavelength of 700 nm to 1000 nm is R70100, which satisfies the following conditions: 0% ＜ R70100 ≤ 1.00%. An imaging optical lens as described in claim 1, wherein the dispersion coefficient of the optical lens is Vs, which satisfies the following conditions: 35.0 ≤ Vs ≤ 85.0. An imaging optical lens as described in claim 15, wherein the refractive index of the optical lens is Ns, which satisfies the following conditions: Ns ≤ 1.85. An imaging optical lens as described in claim 1, wherein the acid resistance of the optical lens is Da, and the dispersion coefficient of the optical lens is Vs, which satisfies the following conditions: 0.6 ≤ Vs×Da/10 ≤ 13.0. An imaging optical lens as described in claim 14, wherein the acid resistance of the optical lens is Da, and the refractive index of the optical lens is Ns, which satisfies the following conditions: 0.1 ≤ Ns×Da ≤ 4.5. An imaging optical lens as described in claim 1, wherein the water resistance of the optical lens is Dw, and the dispersion coefficient of the optical lens is Vs, which satisfies the following conditions: 0 ＜ Vs×Dw ≤ 10.0. An imaging optical lens as described in claim 16, wherein the water resistance of the optical lens is Dw, and the refractive index of the optical lens is Ns, which satisfies the following conditions: 0 ＜ Ns×Dw×100 ≤ 50. The imaging optical lens as described in claim 1 further includes at least one optical element, the material of the optical element is glass, the optical element includes an anti-reflection film, the anti-reflection film of the optical element is located on at least one surface of the optical element, and the optical element is a prism. An imaging device comprises: The imaging optical lens as described in claim 1; and An electronic photosensitive element disposed on an imaging surface of the imaging optical lens. An electronic device is a vehicle device, the electronic device comprising: The imaging device as described in claim 22. An imaging optical lens comprises: At least two optical lenses; and At least one optical element; Wherein, at least one of the optical lenses comprises a long-wavelength absorbing material, and the optical lens comprising the long-wavelength absorbing material is made of a plastic material, and the long-wavelength absorbing material is uniformly mixed in the plastic material; Wherein, at least one of the optical lenses comprises a long-wavelength filter coating, the long-wavelength filter coating is located on the object side surface or the image side surface of the optical lens, the long-wavelength filter coating comprises a plurality of high-refractive index film layers and a plurality of low-refractive index film layers, and the high-refractive index film layers of the long-wavelength filter coating and the low-refractive index film layers of the long-wavelength filter coating are alternately stacked; Wherein, the material of the optical element is glass, the optical element comprises an anti-reflection film, the anti-reflection film of the optical element is located on at least one surface of the optical element, and the optical element is a flat glass; Wherein, the anti-reflection film of the optical element comprises a high-low refractive index film and a gradient refractive index film, and the high-low refractive index film is arranged between the optical element and the gradient refractive index film; Wherein, the high-low refractive index film comprises at least one high refractive index film layer and at least one low refractive index film layer, the high refractive index film layer of the high-low refractive index film and the low refractive index film layer of the high-low refractive index film are alternately stacked, the low refractive index film layer of the high-low refractive index film contacts the optical element, and the main material of the low refractive index film layer of the high-low refractive index film is aluminum oxide; Wherein, the gradient refractive index film comprises a plurality of holes, the holes far from the optical element are relatively larger than the holes close to the optical element, and the main material of the gradient refractive index film is metal oxide.

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